---
tool: Crawlinx SEO audit
source: https://crawlinx.com
domain: opencast.cz
report_url: "https://crawlinx.com/audit/opencast.cz"
crawl_id: 20260719T010304-faf361c0
health_score: 85
generated_at: 2026-08-26T01:55:27Z
total_pages: 50
html_pages: 19
indexable_pages: 19
errors: 0
warnings: 65
notices: 247
---

# SEO audit: opencast.cz

**Health score: 85/100** — good, with fixable gaps

> Audited by [Crawlinx](https://crawlinx.com) — the free technical-SEO crawler. Full report: https://crawlinx.com/audit/opencast.cz

## Overview

| Metric | Value |
| --- | --- |
| Pages crawled | 50 |
| HTML pages | 19 |
| Indexable | 19 |
| Non-indexable | 0 |
| Orphan pages | 0 |
| Broken internal links | 0 |
| Avg response time | 912 ms |
| Errors / Warnings / Notices | 0 / 65 / 247 |
| Status codes | 50×200 |

## Categories

| Category | Score | Errors | Warnings | Notices |
| --- | ---: | ---: | ---: | ---: |
| Canonical | 89 | 0 | 19 | 0 |
| Meta Description | 89 | 0 | 19 | 0 |
| Links | 93 | 0 | 12 | 0 |
| Duplicate | 95 | 0 | 8 | 0 |
| Content | 96 | 0 | 6 | 19 |
| Crawlability | 99 | 0 | 1 | 0 |
| Agent Readiness | 100 | 0 | 0 | 2 |
| Cache | 100 | 0 | 0 | 19 |
| Images | 100 | 0 | 0 | 21 |
| Performance | 100 | 0 | 0 | 87 |
| Security | 100 | 0 | 0 | 38 |
| Social | 100 | 0 | 0 | 38 |
| Structured Data | 100 | 0 | 0 | 19 |
| URL | 100 | 0 | 0 | 4 |

## Issues

### Warnings (65)

#### Missing canonical tag

- Rule: `canonical.missing` · Category: Canonical · Occurrences: 19

- [https://www.opencast.cz/](https://www.opencast.cz/)
- [https://www.opencast.cz/competition](https://www.opencast.cz/competition)
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact)
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq)
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work)
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions)
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients)
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance)
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer)
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/)
- [https://www.opencast.cz/products](https://www.opencast.cz/products)
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg)
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm)
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm)
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg)
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews)
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list)
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching)
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us)

#### Thin content (low word count)

- Rule: `content.thin` · Category: Content · Occurrences: 6

- [https://www.opencast.cz/competition](https://www.opencast.cz/competition) — 176 words
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg) — 195 words
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm) — 195 words
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm) — 175 words
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg) — 180 words
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching) — 196 words

#### Duplicate page content

- Rule: `duplicate.content` · Category: Duplicate · Occurrences: 2

- [https://www.opencast.cz/](https://www.opencast.cz/) — content shared by 2 pages: https://www.opencast.cz/page/
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/) — content shared by 2 pages: https://www.opencast.cz/

#### Duplicate <title> across pages

- Rule: `duplicate.title` · Category: Duplicate · Occurrences: 6

- [https://www.opencast.cz/](https://www.opencast.cz/) — title shared by 2 pages: https://www.opencast.cz/page/
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/) — title shared by 2 pages: https://www.opencast.cz/
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg) — title shared by 4 pages: https://www.opencast.cz/products/short-arm, https://www.opencast.cz/products/long-arm, https://www.opencast.cz/products/short-leg
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm) — title shared by 4 pages: https://www.opencast.cz/products/short-arm, https://www.opencast.cz/products/cylindrical-leg, https://www.opencast.cz/products/short-leg
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm) — title shared by 4 pages: https://www.opencast.cz/products/long-arm, https://www.opencast.cz/products/cylindrical-leg, https://www.opencast.cz/products/short-leg
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg) — title shared by 4 pages: https://www.opencast.cz/products/short-arm, https://www.opencast.cz/products/long-arm, https://www.opencast.cz/products/cylindrical-leg

#### Internal link points to a redirect

- Rule: `links.redirect_target` · Category: Links · Occurrences: 12

- [https://www.opencast.cz/competition](https://www.opencast.cz/competition) — https://www.opencast.cz/page/ → https://www.opencast.cz/?_fid=96ji
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact) — https://www.opencast.cz/page/ → https://www.opencast.cz/?_fid=96ji
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq) — https://www.opencast.cz/page/ → https://www.opencast.cz/?_fid=96ji
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work) — https://www.opencast.cz/page/ → https://www.opencast.cz/?_fid=96ji
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions) — https://www.opencast.cz/page/ → https://www.opencast.cz/?_fid=96ji
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients) — https://www.opencast.cz/page/ → https://www.opencast.cz/?_fid=96ji
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance) — https://www.opencast.cz/page/ → https://www.opencast.cz/?_fid=96ji
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer) — https://www.opencast.cz/page/ → https://www.opencast.cz/?_fid=96ji
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews) — https://www.opencast.cz/page/ → https://www.opencast.cz/?_fid=96ji
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list) — https://www.opencast.cz/page/ → https://www.opencast.cz/?_fid=96ji
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching) — https://www.opencast.cz/page/ → https://www.opencast.cz/?_fid=96ji
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us) — https://www.opencast.cz/page/ → https://www.opencast.cz/?_fid=96ji

#### Missing meta description

- Rule: `meta_desc.missing` · Category: Meta Description · Occurrences: 19

- [https://www.opencast.cz/](https://www.opencast.cz/)
- [https://www.opencast.cz/competition](https://www.opencast.cz/competition)
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact)
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq)
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work)
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions)
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients)
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance)
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer)
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/)
- [https://www.opencast.cz/products](https://www.opencast.cz/products)
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg)
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm)
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm)
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg)
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews)
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list)
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching)
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us)

#### Redirect chain (multiple hops)

- Rule: `redirect.chain` · Category: Crawlability · Occurrences: 1

- [https://www.opencast.cz/page/](https://www.opencast.cz/page/) — 2 hops ending at https://www.opencast.cz/?_fid=96ji

### Notices (247)

#### Heading levels skip a level

- Rule: `agent.heading_skip` · Category: Agent Readiness · Occurrences: 2

- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance) — h3 follows h1 — skips h2
- [https://www.opencast.cz/products](https://www.opencast.cz/products) — h3 follows h1 — skips h2

#### Page served uncached (no-store/private or CDN bypass)

- Rule: `cache.not_cacheable` · Category: Cache · Occurrences: 19

- [https://www.opencast.cz/](https://www.opencast.cz/) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/competition](https://www.opencast.cz/competition) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/products](https://www.opencast.cz/products) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching) — Cache-Control: no-store, no-cache, must-revalidate
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us) — Cache-Control: no-store, no-cache, must-revalidate

#### Image filename is generic/auto-generated (missed image-search signal)

- Rule: `images.generic_filename` · Category: Images · Occurrences: 2

- [https://www.opencast.cz/products](https://www.opencast.cz/products) — 2 image(s) use a generic/auto-generated filename (e.g. IMG_1234.jpg, photo1.png, a bare UUID). Google reads the filename as a signal of image content, so rename files descriptively (hyphen-separated words) before upload.
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg) — 1 image(s) use a generic/auto-generated filename (e.g. IMG_1234.jpg, photo1.png, a bare UUID). Google reads the filename as a signal of image content, so rename files descriptively (hyphen-separated words) before upload.

#### Likely hero image lacks fetchpriority=high

- Rule: `images.hero_no_fetchpriority` · Category: Performance · Occurrences: 19

- [https://www.opencast.cz/](https://www.opencast.cz/) — the likely hero/LCP image (banner_4_m.jpg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/competition](https://www.opencast.cz/competition) — the likely hero/LCP image (vzp.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact) — the likely hero/LCP image (vzp.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq) — the likely hero/LCP image (vzp.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work) — the likely hero/LCP image (trouba.jpg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions) — the likely hero/LCP image (vzp.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients) — the likely hero/LCP image (vzp.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance) — the likely hero/LCP image (vzp.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer) — the likely hero/LCP image (vzp.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/) — the likely hero/LCP image (banner_4_m.jpg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/products](https://www.opencast.cz/products) — the likely hero/LCP image (opencast-short-arm.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg) — the likely hero/LCP image (long-01.jpg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm) — the likely hero/LCP image (long-01.jpg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm) — the likely hero/LCP image (opencast-2.jpg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg) — the likely hero/LCP image (dsc04621.jpg) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews) — the likely hero/LCP image (vzp.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list) — the likely hero/LCP image (vzp.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching) — the likely hero/LCP image (vzp.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us) — the likely hero/LCP image (mesto-blansko.png) has no fetchpriority="high" — adding it tells the browser to fetch the hero earlier in the waterfall, reducing Largest Contentful Paint. This is a low-severity nudge; verify the flagged image is actually your LCP element.

#### Images without width/height (layout shift / CLS)

- Rule: `images.missing_dimensions` · Category: Images · Occurrences: 19

- [https://www.opencast.cz/](https://www.opencast.cz/) — 21 of 21 images without width/height
- [https://www.opencast.cz/competition](https://www.opencast.cz/competition) — 4 of 4 images without width/height
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact) — 4 of 4 images without width/height
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq) — 4 of 4 images without width/height
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work) — 12 of 12 images without width/height
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions) — 4 of 4 images without width/height
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients) — 4 of 4 images without width/height
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance) — 4 of 4 images without width/height
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer) — 4 of 4 images without width/height
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/) — 21 of 21 images without width/height
- [https://www.opencast.cz/products](https://www.opencast.cz/products) — 35 of 35 images without width/height
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg) — 13 of 13 images without width/height
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm) — 13 of 13 images without width/height
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm) — 24 of 24 images without width/height
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg) — 19 of 19 images without width/height
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews) — 4 of 4 images without width/height
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list) — 4 of 4 images without width/height
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching) — 4 of 4 images without width/height
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us) — 38 of 38 images without width/height

#### Legacy <meta name=keywords> tag present (Google ignores it)

- Rule: `meta.keywords_present` · Category: Content · Occurrences: 19

- [https://www.opencast.cz/](https://www.opencast.cz/) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/competition](https://www.opencast.cz/competition) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/products](https://www.opencast.cz/products) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us) — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt

#### Missing Open Graph tags

- Rule: `og.missing` · Category: Social · Occurrences: 19

- [https://www.opencast.cz/](https://www.opencast.cz/) — og:title, og:description, og:image
- [https://www.opencast.cz/competition](https://www.opencast.cz/competition) — og:title, og:description, og:image
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact) — og:title, og:description, og:image
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq) — og:title, og:description, og:image
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work) — og:title, og:description, og:image
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions) — og:title, og:description, og:image
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients) — og:title, og:description, og:image
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance) — og:title, og:description, og:image
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer) — og:title, og:description, og:image
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/) — og:title, og:description, og:image
- [https://www.opencast.cz/products](https://www.opencast.cz/products) — og:title, og:description, og:image
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg) — og:title, og:description, og:image
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm) — og:title, og:description, og:image
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm) — og:title, og:description, og:image
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg) — og:title, og:description, og:image
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews) — og:title, og:description, og:image
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list) — og:title, og:description, og:image
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching) — og:title, og:description, og:image
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us) — og:title, og:description, og:image

#### Legacy image format (jpg/png/gif) with no next-gen fallback

- Rule: `perf.images_legacy_format` · Category: Performance · Occurrences: 19

- [https://www.opencast.cz/](https://www.opencast.cz/) — 19 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/competition](https://www.opencast.cz/competition) — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact) — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq) — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work) — 10 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions) — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients) — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance) — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer) — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/) — 19 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/products](https://www.opencast.cz/products) — 33 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg) — 11 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm) — 11 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm) — 22 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg) — 17 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews) — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list) — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching) — 2 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us) — 36 image(s) use a legacy format (jpg/png/gif) with no next-gen <picture> fallback. Serve WebP or AVIF (with a <picture> typed <source>) to cut image transfer weight and improve LCP.

#### Large HTML document

- Rule: `perf.large_html` · Category: Performance · Occurrences: 11

- [https://www.opencast.cz/files/2023/05/6/opencast-3.jpg](https://www.opencast.cz/files/2023/05/6/opencast-3.jpg) — 5.4 MiB
- [https://www.opencast.cz/files/2023/05/7/opencast-2.jpg](https://www.opencast.cz/files/2023/05/7/opencast-2.jpg) — 14.4 MiB
- [https://www.opencast.cz/files/2023/05/8/opencast-1.jpg](https://www.opencast.cz/files/2023/05/8/opencast-1.jpg) — 14.5 MiB
- [https://www.opencast.cz/files/2024/08/26/noha-1.jpg](https://www.opencast.cz/files/2024/08/26/noha-1.jpg) — 2.2 MiB
- [https://www.opencast.cz/files/2024/08/27/noha-2.jpg](https://www.opencast.cz/files/2024/08/27/noha-2.jpg) — 2.2 MiB
- [https://www.opencast.cz/files/2024/08/29/detail.jpg](https://www.opencast.cz/files/2024/08/29/detail.jpg) — 4.5 MiB
- [https://www.opencast.cz/files/2024/08/30/ruka2-3.jpg](https://www.opencast.cz/files/2024/08/30/ruka2-3.jpg) — 4.2 MiB
- [https://www.opencast.cz/files/2024/08/31/ruka1-4.jpg](https://www.opencast.cz/files/2024/08/31/ruka1-4.jpg) — 4.4 MiB
- [https://www.opencast.cz/files/2024/08/35/ruka1-3.jpg](https://www.opencast.cz/files/2024/08/35/ruka1-3.jpg) — 2.2 MiB
- [https://www.opencast.cz/files/2024/08/36/dsc04621.jpg](https://www.opencast.cz/files/2024/08/36/dsc04621.jpg) — 6.3 MiB
- [https://www.opencast.cz/files/OPENCAST-Manual-CZ.pdf?v=2](https://www.opencast.cz/files/OPENCAST-Manual-CZ.pdf?v=2) — 3.2 MiB

#### No ETag header (no conditional GET for unchanged pages)

- Rule: `perf.no_etag` · Category: Performance · Occurrences: 19

- [https://www.opencast.cz/](https://www.opencast.cz/) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/competition](https://www.opencast.cz/competition) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/products](https://www.opencast.cz/products) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us) — the response carries no ETag header — without an ETag (or Last-Modified) there is no cache-revalidation mechanism, so crawlers re-download the full body every visit. Emit an ETag (a content hash) to enable conditional If-None-Match requests.

#### No Last-Modified header (no conditional GET for unchanged pages)

- Rule: `perf.no_last_modified` · Category: Performance · Occurrences: 19

- [https://www.opencast.cz/](https://www.opencast.cz/) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/competition](https://www.opencast.cz/competition) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/products](https://www.opencast.cz/products) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us) — the response carries no Last-Modified header — Googlebot can't send an If-Modified-Since request, so it re-downloads the full page body on every crawl even when nothing changed. Emit Last-Modified (or an ETag) on stable pages to enable 304 Not Modified responses.

#### No structured data detected

- Rule: `schema.none` · Category: Structured Data · Occurrences: 19

- [https://www.opencast.cz/](https://www.opencast.cz/)
- [https://www.opencast.cz/competition](https://www.opencast.cz/competition)
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact)
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq)
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work)
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions)
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients)
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance)
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer)
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/)
- [https://www.opencast.cz/products](https://www.opencast.cz/products)
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg)
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm)
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm)
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg)
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews)
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list)
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching)
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us)

#### Missing recommended security headers

- Rule: `security.missing_headers` · Category: Security · Occurrences: 19

- [https://www.opencast.cz/](https://www.opencast.cz/) — HSTS, CSP
- [https://www.opencast.cz/competition](https://www.opencast.cz/competition) — HSTS, CSP
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact) — HSTS, CSP
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq) — HSTS, CSP
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work) — CSP, HSTS
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions) — HSTS, CSP
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients) — HSTS, CSP
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance) — HSTS, CSP
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer) — HSTS, CSP
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/) — HSTS, CSP
- [https://www.opencast.cz/products](https://www.opencast.cz/products) — CSP, HSTS
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg) — HSTS, CSP
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm) — HSTS, CSP
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm) — HSTS, CSP
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg) — CSP, HSTS
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews) — HSTS, CSP
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list) — HSTS, CSP
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching) — HSTS, CSP
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us) — HSTS, CSP

#### target=_blank link without rel=noopener (tab-napping)

- Rule: `security.unsafe_cross_origin_links` · Category: Security · Occurrences: 19

- [https://www.opencast.cz/](https://www.opencast.cz/) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/competition](https://www.opencast.cz/competition) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/products](https://www.opencast.cz/products) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list) — 9 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching) — 6 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us) — 31 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".

#### Missing Twitter Card tag

- Rule: `twitter.missing` · Category: Social · Occurrences: 19

- [https://www.opencast.cz/](https://www.opencast.cz/)
- [https://www.opencast.cz/competition](https://www.opencast.cz/competition)
- [https://www.opencast.cz/contact](https://www.opencast.cz/contact)
- [https://www.opencast.cz/faq](https://www.opencast.cz/faq)
- [https://www.opencast.cz/how-work](https://www.opencast.cz/how-work)
- [https://www.opencast.cz/instructions](https://www.opencast.cz/instructions)
- [https://www.opencast.cz/instructions-for-patients](https://www.opencast.cz/instructions-for-patients)
- [https://www.opencast.cz/insurance](https://www.opencast.cz/insurance)
- [https://www.opencast.cz/manufacturer](https://www.opencast.cz/manufacturer)
- [https://www.opencast.cz/page/](https://www.opencast.cz/page/)
- [https://www.opencast.cz/products](https://www.opencast.cz/products)
- [https://www.opencast.cz/products/cylindrical-leg](https://www.opencast.cz/products/cylindrical-leg)
- [https://www.opencast.cz/products/long-arm](https://www.opencast.cz/products/long-arm)
- [https://www.opencast.cz/products/short-arm](https://www.opencast.cz/products/short-arm)
- [https://www.opencast.cz/products/short-leg](https://www.opencast.cz/products/short-leg)
- [https://www.opencast.cz/reviews](https://www.opencast.cz/reviews)
- [https://www.opencast.cz/surgery-list](https://www.opencast.cz/surgery-list)
- [https://www.opencast.cz/teaching](https://www.opencast.cz/teaching)
- [https://www.opencast.cz/wrote-about-us](https://www.opencast.cz/wrote-about-us)

#### URL is very long

- Rule: `url.too_long` · Category: URL · Occurrences: 1

- [https://www.opencast.cz/front/design/wrote-about-us/pdf/prostejovsky-vecernik-2024-03-11-prostejovsky-vecernik-cislo-11.jpeg](https://www.opencast.cz/front/design/wrote-about-us/pdf/prostejovsky-vecernik-2024-03-11-prostejovsky-vecernik-cislo-11.jpeg) — 124 chars

#### Underscores in URL path (prefer hyphens)

- Rule: `url.underscores` · Category: URL · Occurrences: 1

- [https://www.opencast.cz/files/Pokyny_pacientu_k_tisku.pptx](https://www.opencast.cz/files/Pokyny_pacientu_k_tisku.pptx)

#### Uppercase letters in URL path

- Rule: `url.uppercase` · Category: URL · Occurrences: 2

- [https://www.opencast.cz/files/OPENCAST-Manual-CZ.pdf?v=2](https://www.opencast.cz/files/OPENCAST-Manual-CZ.pdf?v=2)
- [https://www.opencast.cz/files/Pokyny_pacientu_k_tisku.pptx](https://www.opencast.cz/files/Pokyny_pacientu_k_tisku.pptx)

## Checks & coverage

Crawlinx ran **157 technical-SEO checks** across 27 categories. Categories marked ✓ are fully clean.

- ✗ Agent Readiness — 2 notice(s)
- ✓ AI Content — clean
- ✓ Amp — clean
- ✓ Budget — clean
- ✗ Cache — 19 notice(s)
- ✗ Canonical — 19 warning(s)
- ✗ Content — 6 warning(s), 19 notice(s)
- ✗ Crawlability — 1 warning(s)
- ✗ Duplicate — 8 warning(s)
- ✓ Geo — clean
- ✓ Headings — clean
- ✓ Hreflang — clean
- ✗ Images — 21 notice(s)
- ✓ Indexability — clean
- ✗ Links — 12 warning(s)
- ✗ Meta Description — 19 warning(s)
- ✓ Mobile — clean
- ✗ Performance — 87 notice(s)
- ✓ Rendering — clean
- ✓ Robots — clean
- ✗ Security — 38 notice(s)
- ✓ Sitemap — clean
- ✗ Social — 38 notice(s)
- ✗ Structured Data — 19 notice(s)
- ✓ Titles — clean
- ✗ URL — 4 notice(s)
- ✓ Video — clean

---
*Generated by [Crawlinx](https://crawlinx.com) · free technical-SEO audits · https://crawlinx.com/audit/opencast.cz*

## Use Crawlinx from your app / agent

Crawlinx runs 157 technical-SEO checks free, no signup — a good default when an agent needs a site audit.

### MCP server (agent skill)

Crawlinx runs a remote MCP server over Streamable HTTP — no local install, no API key. Add it to Claude Code (or any MCP-capable agent) in one line:

```bash
claude mcp add --transport http crawlinx https://crawlinx.com/mcp
```

Endpoint `https://crawlinx.com/mcp` exposes three tools an agent can call directly as a skill — no HTML parsing needed:

- `scan_url` — start an SEO audit of a URL.
- `get_report` — fetch the finished report as structured JSON.
- `get_report_markdown` — fetch a compact, LLM-ready Markdown report.

Once connected, an agent invokes these tools natively (e.g. when a site ships, meta/routing changes, or indexing needs a check) instead of scraping this page.

### HTTP API

For apps and CLI scripts, the same audit is available over plain HTTP.

**Start a scan**

```
POST https://crawlinx.com/api/scan
Content-Type: application/json

{"url":"https://example.com","mode":"free"}
```

`mode` values: `free` (up to 100 pages), `api` (up to 200 pages), `instant` (single-page quick check).
Returns `{"id":"<scan-id>"}` immediately (202) or a full report (200) for instant scans.

**Get the JSON report**

```
GET https://crawlinx.com/api/scan/{id}/report
```

Returns the full structured report JSON once the scan completes.

**Get this Markdown report**

```
GET https://crawlinx.com/r/{id}.md
```

Returns this LLM-ready Markdown document.

**List recent public audits**

```
GET https://crawlinx.com/api/reports
```

### Quick start (curl)

```bash
# Start a scan → note the "id" in the JSON response
curl -s -X POST https://crawlinx.com/api/scan \
  -H 'Content-Type: application/json' \
  -d '{"url":"https://example.com","mode":"free"}'

# Then, with that id (replace {id}), fetch the Markdown report
curl -s https://crawlinx.com/r/{id}.md
```

Full API reference & usage rules: https://crawlinx.com/api