SEO audit for opencast.cz
Úvod | OPENCAST
Health 85/100 (good) · 50 pages crawled · generated 2026-08-26
Download Markdown report (feed to ChatGPT / Claude / Cursor)
| 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 |
Warnings (7 rules)
warning Missing canonical tag
Rule canonical.missing · Canonical · 19 occurrence(s)
- https://www.opencast.cz/
- https://www.opencast.cz/competition
- https://www.opencast.cz/contact
- https://www.opencast.cz/faq
- https://www.opencast.cz/how-work
- https://www.opencast.cz/instructions
- https://www.opencast.cz/instructions-for-patients
- https://www.opencast.cz/insurance
- https://www.opencast.cz/manufacturer
- https://www.opencast.cz/page/
- https://www.opencast.cz/products
- https://www.opencast.cz/products/cylindrical-leg
- https://www.opencast.cz/products/long-arm
- https://www.opencast.cz/products/short-arm
- https://www.opencast.cz/products/short-leg
- https://www.opencast.cz/reviews
- https://www.opencast.cz/surgery-list
- https://www.opencast.cz/teaching
- https://www.opencast.cz/wrote-about-us
warning Thin content (low word count)
Rule content.thin · Content · 6 occurrence(s)
- https://www.opencast.cz/competition — 176 words
- https://www.opencast.cz/products/cylindrical-leg — 195 words
- https://www.opencast.cz/products/long-arm — 195 words
- https://www.opencast.cz/products/short-arm — 175 words
- https://www.opencast.cz/products/short-leg — 180 words
- https://www.opencast.cz/teaching — 196 words
warning Duplicate page content
Rule duplicate.content · Duplicate · 2 occurrence(s)
- https://www.opencast.cz/ — content shared by 2 pages: https://www.opencast.cz/page/
- https://www.opencast.cz/page/ — content shared by 2 pages: https://www.opencast.cz/
warning Duplicate <title> across pages
Rule duplicate.title · Duplicate · 6 occurrence(s)
- https://www.opencast.cz/ — title shared by 2 pages: 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 — 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 — 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 — 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 — 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
warning Internal link points to a redirect
Rule links.redirect_target · Links · 12 occurrence(s)
- 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/page/ → https://www.opencast.cz/?_fid=96ji
- 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/page/ → https://www.opencast.cz/?_fid=96ji
- 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/page/ → https://www.opencast.cz/?_fid=96ji
- 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/page/ → https://www.opencast.cz/?_fid=96ji
- 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/page/ → https://www.opencast.cz/?_fid=96ji
- 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/page/ → https://www.opencast.cz/?_fid=96ji
warning Missing meta description
Rule meta_desc.missing · Meta Description · 19 occurrence(s)
- https://www.opencast.cz/
- https://www.opencast.cz/competition
- https://www.opencast.cz/contact
- https://www.opencast.cz/faq
- https://www.opencast.cz/how-work
- https://www.opencast.cz/instructions
- https://www.opencast.cz/instructions-for-patients
- https://www.opencast.cz/insurance
- https://www.opencast.cz/manufacturer
- https://www.opencast.cz/page/
- https://www.opencast.cz/products
- https://www.opencast.cz/products/cylindrical-leg
- https://www.opencast.cz/products/long-arm
- https://www.opencast.cz/products/short-arm
- https://www.opencast.cz/products/short-leg
- https://www.opencast.cz/reviews
- https://www.opencast.cz/surgery-list
- https://www.opencast.cz/teaching
- https://www.opencast.cz/wrote-about-us
warning Redirect chain (multiple hops)
Rule redirect.chain · Crawlability · 1 occurrence(s)
- https://www.opencast.cz/page/ — 2 hops ending at https://www.opencast.cz/?_fid=96ji
Notices (18 rules)
notice Heading levels skip a level
Rule agent.heading_skip · Agent Readiness · 2 occurrence(s)
- https://www.opencast.cz/insurance — h3 follows h1 — skips h2
- https://www.opencast.cz/products — h3 follows h1 — skips h2
notice Page served uncached (no-store/private or CDN bypass)
Rule cache.not_cacheable · Cache · 19 occurrence(s)
- https://www.opencast.cz/ — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/competition — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/contact — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/faq — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/how-work — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/instructions — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/instructions-for-patients — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/insurance — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/manufacturer — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/page/ — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/products — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/products/cylindrical-leg — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/products/long-arm — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/products/short-arm — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/products/short-leg — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/reviews — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/surgery-list — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/teaching — Cache-Control: no-store, no-cache, must-revalidate
- https://www.opencast.cz/wrote-about-us — Cache-Control: no-store, no-cache, must-revalidate
notice Image filename is generic/auto-generated (missed image-search signal)
Rule images.generic_filename · Images · 2 occurrence(s)
- 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 — 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.
notice Likely hero image lacks fetchpriority=high
Rule images.hero_no_fetchpriority · Performance · 19 occurrence(s)
- 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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/ — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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.
notice Images without width/height (layout shift / CLS)
Rule images.missing_dimensions · Images · 19 occurrence(s)
- https://www.opencast.cz/ — 21 of 21 images without width/height
- https://www.opencast.cz/competition — 4 of 4 images without width/height
- https://www.opencast.cz/contact — 4 of 4 images without width/height
- https://www.opencast.cz/faq — 4 of 4 images without width/height
- https://www.opencast.cz/how-work — 12 of 12 images without width/height
- https://www.opencast.cz/instructions — 4 of 4 images without width/height
- https://www.opencast.cz/instructions-for-patients — 4 of 4 images without width/height
- https://www.opencast.cz/insurance — 4 of 4 images without width/height
- https://www.opencast.cz/manufacturer — 4 of 4 images without width/height
- https://www.opencast.cz/page/ — 21 of 21 images without width/height
- https://www.opencast.cz/products — 35 of 35 images without width/height
- https://www.opencast.cz/products/cylindrical-leg — 13 of 13 images without width/height
- https://www.opencast.cz/products/long-arm — 13 of 13 images without width/height
- https://www.opencast.cz/products/short-arm — 24 of 24 images without width/height
- https://www.opencast.cz/products/short-leg — 19 of 19 images without width/height
- https://www.opencast.cz/reviews — 4 of 4 images without width/height
- https://www.opencast.cz/surgery-list — 4 of 4 images without width/height
- https://www.opencast.cz/teaching — 4 of 4 images without width/height
- https://www.opencast.cz/wrote-about-us — 38 of 38 images without width/height
notice Legacy <meta name=keywords> tag present (Google ignores it)
Rule meta.keywords_present · Content · 19 occurrence(s)
- 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 — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- 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 — 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 — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- 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 — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- 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 — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- 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 — 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 — 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 — 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 — 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 — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- 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 — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
- 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 — a <meta name="keywords"> tag is present — Google has ignored it since 2009; remove it to cut template debt
notice Missing Open Graph tags
Rule og.missing · Social · 19 occurrence(s)
- https://www.opencast.cz/ — og:title, og:description, og:image
- https://www.opencast.cz/competition — og:title, og:description, og:image
- https://www.opencast.cz/contact — og:title, og:description, og:image
- https://www.opencast.cz/faq — og:title, og:description, og:image
- https://www.opencast.cz/how-work — og:title, og:description, og:image
- https://www.opencast.cz/instructions — og:title, og:description, og:image
- https://www.opencast.cz/instructions-for-patients — og:title, og:description, og:image
- https://www.opencast.cz/insurance — og:title, og:description, og:image
- https://www.opencast.cz/manufacturer — og:title, og:description, og:image
- https://www.opencast.cz/page/ — og:title, og:description, og:image
- https://www.opencast.cz/products — og:title, og:description, og:image
- https://www.opencast.cz/products/cylindrical-leg — og:title, og:description, og:image
- https://www.opencast.cz/products/long-arm — og:title, og:description, og:image
- https://www.opencast.cz/products/short-arm — og:title, og:description, og:image
- https://www.opencast.cz/products/short-leg — og:title, og:description, og:image
- https://www.opencast.cz/reviews — og:title, og:description, og:image
- https://www.opencast.cz/surgery-list — og:title, og:description, og:image
- https://www.opencast.cz/teaching — og:title, og:description, og:image
- https://www.opencast.cz/wrote-about-us — og:title, og:description, og:image
notice Legacy image format (jpg/png/gif) with no next-gen fallback
Rule perf.images_legacy_format · Performance · 19 occurrence(s)
- 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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/ — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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.
notice Large HTML document
Rule perf.large_html · Performance · 11 occurrence(s)
- 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 — 14.4 MiB
- 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 — 2.2 MiB
- https://www.opencast.cz/files/2024/08/27/noha-2.jpg — 2.2 MiB
- https://www.opencast.cz/files/2024/08/29/detail.jpg — 4.5 MiB
- 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 — 4.4 MiB
- https://www.opencast.cz/files/2024/08/35/ruka1-3.jpg — 2.2 MiB
- https://www.opencast.cz/files/2024/08/36/dsc04621.jpg — 6.3 MiB
- https://www.opencast.cz/files/OPENCAST-Manual-CZ.pdf?v=2 — 3.2 MiB
notice No ETag header (no conditional GET for unchanged pages)
Rule perf.no_etag · Performance · 19 occurrence(s)
- 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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/ — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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.
notice No Last-Modified header (no conditional GET for unchanged pages)
Rule perf.no_last_modified · Performance · 19 occurrence(s)
- 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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/ — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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.
notice No structured data detected
Rule schema.none · Structured Data · 19 occurrence(s)
- https://www.opencast.cz/
- https://www.opencast.cz/competition
- https://www.opencast.cz/contact
- https://www.opencast.cz/faq
- https://www.opencast.cz/how-work
- https://www.opencast.cz/instructions
- https://www.opencast.cz/instructions-for-patients
- https://www.opencast.cz/insurance
- https://www.opencast.cz/manufacturer
- https://www.opencast.cz/page/
- https://www.opencast.cz/products
- https://www.opencast.cz/products/cylindrical-leg
- https://www.opencast.cz/products/long-arm
- https://www.opencast.cz/products/short-arm
- https://www.opencast.cz/products/short-leg
- https://www.opencast.cz/reviews
- https://www.opencast.cz/surgery-list
- https://www.opencast.cz/teaching
- https://www.opencast.cz/wrote-about-us
notice Missing recommended security headers
Rule security.missing_headers · Security · 19 occurrence(s)
- https://www.opencast.cz/ — HSTS, CSP
- https://www.opencast.cz/competition — HSTS, CSP
- https://www.opencast.cz/contact — HSTS, CSP
- https://www.opencast.cz/faq — HSTS, CSP
- https://www.opencast.cz/how-work — CSP, HSTS
- https://www.opencast.cz/instructions — HSTS, CSP
- https://www.opencast.cz/instructions-for-patients — HSTS, CSP
- https://www.opencast.cz/insurance — HSTS, CSP
- https://www.opencast.cz/manufacturer — HSTS, CSP
- https://www.opencast.cz/page/ — HSTS, CSP
- https://www.opencast.cz/products — CSP, HSTS
- https://www.opencast.cz/products/cylindrical-leg — HSTS, CSP
- https://www.opencast.cz/products/long-arm — HSTS, CSP
- https://www.opencast.cz/products/short-arm — HSTS, CSP
- https://www.opencast.cz/products/short-leg — CSP, HSTS
- https://www.opencast.cz/reviews — HSTS, CSP
- https://www.opencast.cz/surgery-list — HSTS, CSP
- https://www.opencast.cz/teaching — HSTS, CSP
- https://www.opencast.cz/wrote-about-us — HSTS, CSP
notice target=_blank link without rel=noopener (tab-napping)
Rule security.unsafe_cross_origin_links · Security · 19 occurrence(s)
- 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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/ — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 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 — 31 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer".
notice Missing Twitter Card tag
Rule twitter.missing · Social · 19 occurrence(s)
- https://www.opencast.cz/
- https://www.opencast.cz/competition
- https://www.opencast.cz/contact
- https://www.opencast.cz/faq
- https://www.opencast.cz/how-work
- https://www.opencast.cz/instructions
- https://www.opencast.cz/instructions-for-patients
- https://www.opencast.cz/insurance
- https://www.opencast.cz/manufacturer
- https://www.opencast.cz/page/
- https://www.opencast.cz/products
- https://www.opencast.cz/products/cylindrical-leg
- https://www.opencast.cz/products/long-arm
- https://www.opencast.cz/products/short-arm
- https://www.opencast.cz/products/short-leg
- https://www.opencast.cz/reviews
- https://www.opencast.cz/surgery-list
- https://www.opencast.cz/teaching
- https://www.opencast.cz/wrote-about-us
notice URL is very long
Rule url.too_long · URL · 1 occurrence(s)
notice Underscores in URL path (prefer hyphens)
Rule url.underscores · URL · 1 occurrence(s)
notice Uppercase letters in URL path
Rule url.uppercase · URL · 2 occurrence(s)
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