--- tool: Crawlinx SEO audit source: https://crawlinx.com domain: xxlnet.nl report_url: "https://crawlinx.com/audit/xxlnet.nl" crawl_id: 20260726T010703-abf697da health_score: 83 generated_at: 2026-07-29T00:39:46Z total_pages: 33 html_pages: 12 indexable_pages: 12 errors: 0 warnings: 74 notices: 141 --- # SEO audit: xxlnet.nl **Health score: 83/100** — good, with fixable gaps > Audited by [Crawlinx](https://crawlinx.com) — the free technical-SEO crawler. Full report: https://crawlinx.com/audit/xxlnet.nl ## Overview | Metric | Value | | --- | --- | | Pages crawled | 33 | | HTML pages | 12 | | Indexable | 12 | | Non-indexable | 0 | | Orphan pages | 0 | | Broken internal links | 0 | | Avg response time | 926 ms | | Errors / Warnings / Notices | 0 / 74 / 141 | | Status codes | 33×200 | ## Categories | Category | Score | Errors | Warnings | Notices | | --- | ---: | ---: | ---: | ---: | | Agent Readiness | 89 | 0 | 12 | 12 | | Canonical | 89 | 0 | 12 | 0 | | Meta Description | 89 | 0 | 12 | 0 | | Performance | 89 | 0 | 12 | 36 | | Headings | 91 | 0 | 10 | 0 | | Content | 93 | 0 | 8 | 0 | | Duplicate | 95 | 0 | 6 | 0 | | Crawlability | 99 | 0 | 1 | 0 | | Links | 99 | 0 | 1 | 13 | | Images | 100 | 0 | 0 | 3 | | Security | 100 | 0 | 0 | 24 | | Social | 100 | 0 | 0 | 24 | | Structured Data | 100 | 0 | 0 | 12 | | URL | 100 | 0 | 0 | 17 | ## Issues ### Warnings (74) #### Control has no accessible name - Rule: `agent.control_no_name` · Category: Agent Readiness · Occurrences: 12 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) — 1 button/link(s) with no text or aria-label — an agent can't target them - [https://xxlnet.nl/](https://xxlnet.nl/) — 1 button/link(s) with no text or aria-label — an agent can't target them - [https://xxlnet.nl/contact/](https://xxlnet.nl/contact/) — 1 button/link(s) with no text or aria-label — an agent can't target them - [https://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) — 1 button/link(s) with no text or aria-label — an agent can't target them - [https://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) — 1 button/link(s) with no text or aria-label — an agent can't target them - [https://xxlnet.nl/internet/](https://xxlnet.nl/internet/) — 1 button/link(s) with no text or aria-label — an agent can't target them - [https://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) — 1 button/link(s) with no text or aria-label — an agent can't target them - [https://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) — 1 button/link(s) with no text or aria-label — an agent can't target them - [https://xxlnet.nl/noc/](https://xxlnet.nl/noc/) — 1 button/link(s) with no text or aria-label — an agent can't target them - [https://xxlnet.nl/privacy/](https://xxlnet.nl/privacy/) — 1 button/link(s) with no text or aria-label — an agent can't target them - [https://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) — 1 button/link(s) with no text or aria-label — an agent can't target them - [https://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) — 1 button/link(s) with no text or aria-label — an agent can't target them #### Missing canonical tag - Rule: `canonical.missing` · Category: Canonical · Occurrences: 12 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) - [https://xxlnet.nl/](https://xxlnet.nl/) - [https://xxlnet.nl/contact/](https://xxlnet.nl/contact/) - [https://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) - [https://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) - [https://xxlnet.nl/internet/](https://xxlnet.nl/internet/) - [https://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) - [https://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) - [https://xxlnet.nl/noc/](https://xxlnet.nl/noc/) - [https://xxlnet.nl/privacy/](https://xxlnet.nl/privacy/) - [https://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) - [https://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) #### Thin content (low word count) - Rule: `content.thin` · Category: Content · Occurrences: 8 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) — 18 words - [https://xxlnet.nl/](https://xxlnet.nl/) — 170 words - [https://xxlnet.nl/contact/](https://xxlnet.nl/contact/) — 126 words - [https://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) — 164 words - [https://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) — 181 words - [https://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) — 64 words - [https://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) — 52 words - [https://xxlnet.nl/noc/](https://xxlnet.nl/noc/) — 59 words #### Homepage duplicated across protocol/host variants (no redirect) - Rule: `duplicate.protocol_host` · Category: Duplicate · Occurrences: 1 - [https://xxlnet.nl/](https://xxlnet.nl/) — http://xxlnet.nl/ serves the same homepage content with a 200 and no redirect — Google sees a duplicate. Pick one canonical host/scheme and 301-redirect the others. #### Duplicate across pages - Rule: `duplicate.title` · Category: Duplicate · Occurrences: 5 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) — title shared by 3 pages: https://xxlnet.nl/telefonie/, https://xxlnet.nl/telefonie/gesprekskosten/ - [https://xxlnet.nl/internet/](https://xxlnet.nl/internet/) — title shared by 2 pages: https://xxlnet.nl/internet/postcode-check/ - [https://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) — title shared by 2 pages: https://xxlnet.nl/internet/ - [https://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) — title shared by 3 pages: https://xxlnet.nl/telefonie/gesprekskosten/, https://www.xxlnet.nl/nummerbehoud/ - [https://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) — title shared by 3 pages: https://xxlnet.nl/telefonie/, https://www.xxlnet.nl/nummerbehoud/ #### Missing <h1> - Rule: `h1.missing` · Category: Headings · Occurrences: 10 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) - [https://xxlnet.nl/contact/](https://xxlnet.nl/contact/) - [https://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) - [https://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) - [https://xxlnet.nl/internet/](https://xxlnet.nl/internet/) - [https://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) - [https://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) - [https://xxlnet.nl/noc/](https://xxlnet.nl/noc/) - [https://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) - [https://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) #### Internal link points to a redirect - Rule: `links.redirect_target` · Category: Links · Occurrences: 1 - [https://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) — https://www.xxlnet.nl/nummerbehoud/ → https://xxlnet.nl/telefonie/nummerbehoud/ #### Missing meta description - Rule: `meta_desc.missing` · Category: Meta Description · Occurrences: 12 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) - [https://xxlnet.nl/](https://xxlnet.nl/) - [https://xxlnet.nl/contact/](https://xxlnet.nl/contact/) - [https://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) - [https://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) - [https://xxlnet.nl/internet/](https://xxlnet.nl/internet/) - [https://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) - [https://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) - [https://xxlnet.nl/noc/](https://xxlnet.nl/noc/) - [https://xxlnet.nl/privacy/](https://xxlnet.nl/privacy/) - [https://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) - [https://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) #### Render-blocking script in <head> (no defer/async) - Rule: `perf.render_blocking` · Category: Performance · Occurrences: 12 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) — 16 render-blocking <script> in <head> (add defer/async or use type=module) - [https://xxlnet.nl/](https://xxlnet.nl/) — 16 render-blocking <script> in <head> (add defer/async or use type=module) - [https://xxlnet.nl/contact/](https://xxlnet.nl/contact/) — 16 render-blocking <script> in <head> (add defer/async or use type=module) - [https://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) — 16 render-blocking <script> in <head> (add defer/async or use type=module) - [https://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) — 16 render-blocking <script> in <head> (add defer/async or use type=module) - [https://xxlnet.nl/internet/](https://xxlnet.nl/internet/) — 16 render-blocking <script> in <head> (add defer/async or use type=module) - [https://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) — 16 render-blocking <script> in <head> (add defer/async or use type=module) - [https://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) — 16 render-blocking <script> in <head> (add defer/async or use type=module) - [https://xxlnet.nl/noc/](https://xxlnet.nl/noc/) — 16 render-blocking <script> in <head> (add defer/async or use type=module) - [https://xxlnet.nl/privacy/](https://xxlnet.nl/privacy/) — 16 render-blocking <script> in <head> (add defer/async or use type=module) - [https://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) — 16 render-blocking <script> in <head> (add defer/async or use type=module) - [https://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) — 16 render-blocking <script> in <head> (add defer/async or use type=module) #### Redirect chain (multiple hops) - Rule: `redirect.chain` · Category: Crawlability · Occurrences: 1 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) — 2 hops ending at https://xxlnet.nl/telefonie/nummerbehoud/ ### Notices (141) #### Heading levels skip a level - Rule: `agent.heading_skip` · Category: Agent Readiness · Occurrences: 1 - [https://xxlnet.nl/privacy/](https://xxlnet.nl/privacy/) — h3 follows h1 — skips h2 #### No main landmark for AI agents - Rule: `agent.no_main_landmark` · Category: Agent Readiness · Occurrences: 11 - [https://xxlnet.nl/](https://xxlnet.nl/) — add a <main> element (or role=main) around the primary content - [https://xxlnet.nl/contact/](https://xxlnet.nl/contact/) — add a <main> element (or role=main) around the primary content - [https://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) — add a <main> element (or role=main) around the primary content - [https://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) — add a <main> element (or role=main) around the primary content - [https://xxlnet.nl/internet/](https://xxlnet.nl/internet/) — add a <main> element (or role=main) around the primary content - [https://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) — add a <main> element (or role=main) around the primary content - [https://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) — add a <main> element (or role=main) around the primary content - [https://xxlnet.nl/noc/](https://xxlnet.nl/noc/) — add a <main> element (or role=main) around the primary content - [https://xxlnet.nl/privacy/](https://xxlnet.nl/privacy/) — add a <main> element (or role=main) around the primary content - [https://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) — add a <main> element (or role=main) around the primary content - [https://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) — add a <main> element (or role=main) around the primary content #### Likely hero image lacks fetchpriority=high - Rule: `images.hero_no_fetchpriority` · Category: Performance · Occurrences: 3 - [https://xxlnet.nl/](https://xxlnet.nl/) — the likely hero/LCP image (header1-1.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://xxlnet.nl/contact/](https://xxlnet.nl/contact/) — the likely hero/LCP image (xxlmaps.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://xxlnet.nl/internet/](https://xxlnet.nl/internet/) — the likely hero/LCP image (client-1.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: 3 - [https://xxlnet.nl/](https://xxlnet.nl/) — 2 of 2 images without width/height - [https://xxlnet.nl/contact/](https://xxlnet.nl/contact/) — 1 of 1 images without width/height - [https://xxlnet.nl/internet/](https://xxlnet.nl/internet/) — 6 of 6 images without width/height #### Internal link has no anchor text / accessible name - Rule: `links.no_anchor_text` · Category: Links · Occurrences: 12 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label. - [https://xxlnet.nl/](https://xxlnet.nl/) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label. - [https://xxlnet.nl/contact/](https://xxlnet.nl/contact/) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label. - [https://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label. - [https://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label. - [https://xxlnet.nl/internet/](https://xxlnet.nl/internet/) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label. - [https://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label. - [https://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label. - [https://xxlnet.nl/noc/](https://xxlnet.nl/noc/) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label. - [https://xxlnet.nl/privacy/](https://xxlnet.nl/privacy/) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label. - [https://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label. - [https://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) — 1 internal link(s) have no anchor text, aria-label, or image alt — they pass no keyword signal and are unusable to screen readers. Add descriptive text or an aria-label. #### Page has only one internal inlink (fragile crawl path) - Rule: `links.single_inlink` · Category: Links · Occurrences: 1 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) — only one internal link points here — if that source changes, this page becomes an orphan. Add more contextual internal links to strengthen the crawl path. #### Missing Open Graph tags - Rule: `og.missing` · Category: Social · Occurrences: 12 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) — og:title, og:description, og:image - [https://xxlnet.nl/](https://xxlnet.nl/) — og:title, og:description, og:image - [https://xxlnet.nl/contact/](https://xxlnet.nl/contact/) — og:title, og:description, og:image - [https://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) — og:title, og:description, og:image - [https://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) — og:title, og:description, og:image - [https://xxlnet.nl/internet/](https://xxlnet.nl/internet/) — og:title, og:description, og:image - [https://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) — og:title, og:description, og:image - [https://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) — og:title, og:description, og:image - [https://xxlnet.nl/noc/](https://xxlnet.nl/noc/) — og:title, og:description, og:image - [https://xxlnet.nl/privacy/](https://xxlnet.nl/privacy/) — og:title, og:description, og:image - [https://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) — og:title, og:description, og:image - [https://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) — og:title, og:description, og:image #### Large DOM (over 1500 elements) slows rendering & interaction - Rule: `perf.dom_size_large` · Category: Performance · Occurrences: 1 - [https://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) — the page has 4659 DOM elements (recommended maximum is around 1500) — a large DOM increases style-recalculation, layout and paint cost, hurting LCP and INP. Flatten deep nesting, paginate long lists/tables, and lazy-render off-screen elements. #### Legacy image format (jpg/png/gif) with no next-gen fallback - Rule: `perf.images_legacy_format` · Category: Performance · Occurrences: 3 - [https://xxlnet.nl/](https://xxlnet.nl/) — 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://xxlnet.nl/contact/](https://xxlnet.nl/contact/) — 1 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://xxlnet.nl/internet/](https://xxlnet.nl/internet/) — 6 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: 5 - [https://xxlnet.nl/download/2015/Bestelformulier-glazen-maas-llyodskwartier.pdf](https://xxlnet.nl/download/2015/Bestelformulier-glazen-maas-llyodskwartier.pdf) — 2.3 MiB - [https://xxlnet.nl/download/2015/Bestelformulier-wilhelminakade.pdf](https://xxlnet.nl/download/2015/Bestelformulier-wilhelminakade.pdf) — 2.3 MiB - [https://xxlnet.nl/download/2018/Bestelformulier-Telefonie.pdf](https://xxlnet.nl/download/2018/Bestelformulier-Telefonie.pdf) — 4.4 MiB - [https://xxlnet.nl/download/pluginchrome.zip](https://xxlnet.nl/download/pluginchrome.zip) — 2.2 MiB - [https://xxlnet.nl/download/siptapi.zip](https://xxlnet.nl/download/siptapi.zip) — 2.4 MiB #### No ETag header (no conditional GET for unchanged pages) - Rule: `perf.no_etag` · Category: Performance · Occurrences: 12 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) — 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://xxlnet.nl/](https://xxlnet.nl/) — 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://xxlnet.nl/contact/](https://xxlnet.nl/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://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) — 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://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) — 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://xxlnet.nl/internet/](https://xxlnet.nl/internet/) — 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://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) — 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://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) — 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://xxlnet.nl/noc/](https://xxlnet.nl/noc/) — 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://xxlnet.nl/privacy/](https://xxlnet.nl/privacy/) — 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://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) — 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://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) — 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: 12 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) — 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://xxlnet.nl/](https://xxlnet.nl/) — 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://xxlnet.nl/contact/](https://xxlnet.nl/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://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) — 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://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) — 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://xxlnet.nl/internet/](https://xxlnet.nl/internet/) — 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://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) — 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://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) — 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://xxlnet.nl/noc/](https://xxlnet.nl/noc/) — 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://xxlnet.nl/privacy/](https://xxlnet.nl/privacy/) — 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://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) — 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://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) — 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: 12 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) - [https://xxlnet.nl/](https://xxlnet.nl/) - [https://xxlnet.nl/contact/](https://xxlnet.nl/contact/) - [https://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) - [https://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) - [https://xxlnet.nl/internet/](https://xxlnet.nl/internet/) - [https://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) - [https://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) - [https://xxlnet.nl/noc/](https://xxlnet.nl/noc/) - [https://xxlnet.nl/privacy/](https://xxlnet.nl/privacy/) - [https://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) - [https://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) #### Missing recommended security headers - Rule: `security.missing_headers` · Category: Security · Occurrences: 12 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) — HSTS, CSP, X-Content-Type-Options - [https://xxlnet.nl/](https://xxlnet.nl/) — HSTS, CSP, X-Content-Type-Options - [https://xxlnet.nl/contact/](https://xxlnet.nl/contact/) — CSP, X-Content-Type-Options, HSTS - [https://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) — HSTS, CSP, X-Content-Type-Options - [https://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) — HSTS, CSP, X-Content-Type-Options - [https://xxlnet.nl/internet/](https://xxlnet.nl/internet/) — HSTS, CSP, X-Content-Type-Options - [https://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) — CSP, X-Content-Type-Options, HSTS - [https://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) — HSTS, CSP, X-Content-Type-Options - [https://xxlnet.nl/noc/](https://xxlnet.nl/noc/) — HSTS, CSP, X-Content-Type-Options - [https://xxlnet.nl/privacy/](https://xxlnet.nl/privacy/) — X-Content-Type-Options, HSTS, CSP - [https://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) — HSTS, CSP, X-Content-Type-Options - [https://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) — HSTS, CSP, X-Content-Type-Options #### target=_blank link without rel=noopener (tab-napping) - Rule: `security.unsafe_cross_origin_links` · Category: Security · Occurrences: 12 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) — 1 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer". - [https://xxlnet.nl/](https://xxlnet.nl/) — 5 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer". - [https://xxlnet.nl/contact/](https://xxlnet.nl/contact/) — 2 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer". - [https://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) — 1 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer". - [https://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) — 5 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer". - [https://xxlnet.nl/internet/](https://xxlnet.nl/internet/) — 7 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer". - [https://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) — 1 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer". - [https://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) — 5 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer". - [https://xxlnet.nl/noc/](https://xxlnet.nl/noc/) — 1 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer". - [https://xxlnet.nl/privacy/](https://xxlnet.nl/privacy/) — 1 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer". - [https://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) — 4 external link(s) use target="_blank" without rel="noopener" — the opened page can hijack your tab (reverse tab-napping). Add rel="noopener noreferrer". - [https://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) — 1 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: 12 - [https://www.xxlnet.nl/nummerbehoud/](https://www.xxlnet.nl/nummerbehoud/) - [https://xxlnet.nl/](https://xxlnet.nl/) - [https://xxlnet.nl/contact/](https://xxlnet.nl/contact/) - [https://xxlnet.nl/datacenter/](https://xxlnet.nl/datacenter/) - [https://xxlnet.nl/formulieren/](https://xxlnet.nl/formulieren/) - [https://xxlnet.nl/internet/](https://xxlnet.nl/internet/) - [https://xxlnet.nl/internet/postcode-check/](https://xxlnet.nl/internet/postcode-check/) - [https://xxlnet.nl/klantenservice/](https://xxlnet.nl/klantenservice/) - [https://xxlnet.nl/noc/](https://xxlnet.nl/noc/) - [https://xxlnet.nl/privacy/](https://xxlnet.nl/privacy/) - [https://xxlnet.nl/telefonie/](https://xxlnet.nl/telefonie/) - [https://xxlnet.nl/telefonie/gesprekskosten/](https://xxlnet.nl/telefonie/gesprekskosten/) #### Uppercase letters in URL path - Rule: `url.uppercase` · Category: URL · Occurrences: 17 - [https://xxlnet.nl/download/2015/Bestelformulier-glazen-maas-llyodskwartier.pdf](https://xxlnet.nl/download/2015/Bestelformulier-glazen-maas-llyodskwartier.pdf) - [https://xxlnet.nl/download/2015/Bestelformulier-wilhelminakade.pdf](https://xxlnet.nl/download/2015/Bestelformulier-wilhelminakade.pdf) - [https://xxlnet.nl/download/2016/Tenaamstelling.pdf](https://xxlnet.nl/download/2016/Tenaamstelling.pdf) - [https://xxlnet.nl/download/2017/Bestelformulier-DSL-2017.pdf](https://xxlnet.nl/download/2017/Bestelformulier-DSL-2017.pdf) - [https://xxlnet.nl/download/2017/Bestelformulier-SmartGlasnet-2017.pdf](https://xxlnet.nl/download/2017/Bestelformulier-SmartGlasnet-2017.pdf) - [https://xxlnet.nl/download/2017/Bestelformulier-bytesnet.pdf](https://xxlnet.nl/download/2017/Bestelformulier-bytesnet.pdf) - [https://xxlnet.nl/download/2017/Bestelformulier-eurofiber-2017-algemeen.pdf](https://xxlnet.nl/download/2017/Bestelformulier-eurofiber-2017-algemeen.pdf) - [https://xxlnet.nl/download/2017/Bestelformulier-rekam-2017-algemeen.pdf](https://xxlnet.nl/download/2017/Bestelformulier-rekam-2017-algemeen.pdf) - [https://xxlnet.nl/download/2017/Incassoformulier.pdf](https://xxlnet.nl/download/2017/Incassoformulier.pdf) - [https://xxlnet.nl/download/2018/Bestelformulier-BrightFiber-2018-De-Mijl-Oslo-2-24.pdf](https://xxlnet.nl/download/2018/Bestelformulier-BrightFiber-2018-De-Mijl-Oslo-2-24.pdf) - [https://xxlnet.nl/download/2018/Bestelformulier-BrightFiber-2018-Oslo-Algemeen.pdf](https://xxlnet.nl/download/2018/Bestelformulier-BrightFiber-2018-Oslo-Algemeen.pdf) - [https://xxlnet.nl/download/2018/Bestelformulier-SolidFiber-2018-algemeen.pdf](https://xxlnet.nl/download/2018/Bestelformulier-SolidFiber-2018-algemeen.pdf) - [https://xxlnet.nl/download/2018/Bestelformulier-Telefonie.pdf](https://xxlnet.nl/download/2018/Bestelformulier-Telefonie.pdf) - [https://xxlnet.nl/download/2018/Bestelformulier-easyfiber-2018-algemeen.pdf](https://xxlnet.nl/download/2018/Bestelformulier-easyfiber-2018-algemeen.pdf) - [https://xxlnet.nl/download/2018/Bestelformulier-fore-freedom-2018-algemeen.pdf](https://xxlnet.nl/download/2018/Bestelformulier-fore-freedom-2018-algemeen.pdf) - [https://xxlnet.nl/download/2019/Bestelformulier-Rekam-2018-Gouwespoor.pdf](https://xxlnet.nl/download/2019/Bestelformulier-Rekam-2018-Gouwespoor.pdf) - [https://xxlnet.nl/download/Fair%20Use%20Policy%20-%20XXLNet.pdf](https://xxlnet.nl/download/Fair%20Use%20Policy%20-%20XXLNet.pdf) ## Checks & coverage Crawlinx ran **157 technical-SEO checks** across 27 categories. Categories marked ✓ are fully clean. - ✗ Agent Readiness — 12 warning(s), 12 notice(s) - ✓ AI Content — clean - ✓ Amp — clean - ✓ Budget — clean - ✓ Cache — clean - ✗ Canonical — 12 warning(s) - ✗ Content — 8 warning(s) - ✗ Crawlability — 1 warning(s) - ✗ Duplicate — 6 warning(s) - ✓ Geo — clean - ✗ Headings — 10 warning(s) - ✓ Hreflang — clean - ✗ Images — 3 notice(s) - ✓ Indexability — clean - ✗ Links — 1 warning(s), 13 notice(s) - ✗ Meta Description — 12 warning(s) - ✓ Mobile — clean - ✗ Performance — 12 warning(s), 36 notice(s) - ✓ Rendering — clean - ✓ Robots — clean - ✗ Security — 24 notice(s) - ✓ Sitemap — clean - ✗ Social — 24 notice(s) - ✗ Structured Data — 12 notice(s) - ✓ Titles — clean - ✗ URL — 17 notice(s) - ✓ Video — clean --- *Generated by [Crawlinx](https://crawlinx.com) · free technical-SEO audits · https://crawlinx.com/audit/xxlnet.nl* ## 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