# BeaverCheck Audit Report — https://vu.nl

**Date:** April 22, 2026  
**URL:** https://vu.nl  
**Overall Grade:** C (74/100)  
**Report:** https://beavercheck.com/results/df402815-a81e-4fa9-b1fd-5121d3d20332

## Top Findings

1. **[CRITICAL]** Content-Security-Policy header is missing — Security > Security Headers
2. **[CRITICAL]** No Content-Security-Policy header found — Security > Content Security Policy
3. **[CRITICAL]** Page weighs 5.0 MB (5.0 MB transferred) — Performance > Page Weight Budget
4. **[CRITICAL]** 2 control(s) without accessible label — Accessibility > Form Accessibility
5. **[CRITICAL]** 4 image(s) missing alt attribute — Accessibility > Alt Text Quality

---

## Lighthouse Scores

| Category | Score |
|----------|-------|
| Performance | 47 |
| Accessibility | 66 |
| Best Practices | 100 |
| SEO | 92 |

---

## Security

### Security Headers (D — 50/100)

*5 of 10 headers properly configured*

- **[PASS]** Strict-Transport-Security is properly configured (consider adding preload)
- **[PASS]** X-Content-Type-Options is properly configured
- **[PASS]** X-Frame-Options is properly configured
- **[WARNING]** Referrer-Policy header is missing — Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter.
- **[WARNING]** Permissions-Policy header is missing — Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features.
- **[CRITICAL]** Content-Security-Policy header is missing — CSP is the most important header for preventing XSS attacks. See the CSP section for detailed analysis.
- **[WARNING]** Cross-Origin-Opener-Policy header is missing — COOP isolates your browsing context, preventing cross-origin side-channel attacks. Set to 'same-origin'.
- **[WARNING]** Cross-Origin-Embedder-Policy header is missing — COEP prevents loading cross-origin resources without explicit permission. Required for SharedArrayBuffer and high-resolution timers.
- **[PASS]** X-Powered-By header is not present
- **[PASS]** Server header is not present

### Content Security Policy (F — 0/100)

*No enforcing CSP policy found*

- **[CRITICAL]** No Content-Security-Policy header found — CSP is the most effective defense against XSS attacks. Add a Content-Security-Policy header to restrict resource loading.

### TLS & Certificates (A+ — 100/100)

*TLS 1.3, 7 checks passed*

- **[PASS]** TLS 1.3 is used
- **[PASS]** Strong cipher suite is used
- **[INFO]** HTTP/2 is not negotiated — HTTP/2 provides multiplexing and header compression for better performance.
- **[PASS]** Certificate is valid (expires in 233 days)
- **[PASS]** Certificate chain has 3 certificates
- **[PASS]** Certificate uses modern signature algorithm
- **[PASS]** Certificate covers 2 domain(s)
- **[PASS]** Certificate is issued by a trusted CA

### Cookie Security (A+ — 100/100)

*No cookies set — no cookie security risks*

- **[PASS]** No cookies set — no cookie security risks

---

## Advanced Security

### Subresource Integrity (A+ — 100/100)

*No external resources*

- **[PASS]** No external resources to protect

### JS Library Vulnerabilities (A+ — 100/100)

*No known vulnerabilities*

- **[PASS]** No known JavaScript library vulnerabilities detected

### Information Leakage (A+ — 100/100)

*No exposures*

- **[INFO]** No security.txt found — Consider adding a security.txt at /.well-known/security.txt.
- **[PASS]** No sensitive files exposed

### Email Security (A — 85/100)

*DMARC: quarantine*

- **[PASS]** DMARC policy is quarantine — good protection

### Permissions-Policy (D — 40/100)

*No header set*

- **[WARNING]** No Permissions-Policy header — Consider adding a Permissions-Policy header to restrict browser feature access from embedded content.

### CORS Configuration (B — 80/100)

*No CORS headers*

- **[PASS]** No CORS headers present — secure default

---

## Performance

### Page Weight Budget (F — 0/100)

*5.0 MB transferred, 37 requests*

- **[CRITICAL]** Page weighs 5.0 MB (5.0 MB transferred)
- **[WARNING]** JavaScript is 2.4 MB — consider code splitting or lazy loading — Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
- **[WARNING]** Images are 1.1 MB — compress or use modern formats — Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
- **[INFO]** CSS is 760 KB — consider purging unused styles — Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
- **[INFO]** Fonts are 518 KB — consider subsetting or using system fonts — Subset fonts to include only used characters, or switch to system font stacks.
- **[PASS]** 37 HTTP requests
- **[INFO]** Estimated 1.1 g CO2 per page load

### Third-Party Impact (A — 85/100)

*21% third-party, 0 ms blocking*

- **[INFO]** Third-party code accounts for 21% of page weight (1.0 MiB of 5.0 MiB)
- **[PASS]** Third-party blocking time is low (0 ms)

### Text Compression (A+ — 100/100)

*All text resources are compressed*

- **[PASS]** All text resources are compressed

### Image Optimization (B — 75/100)

*20 images, 0 KB saveable*

- **[PASS]** All images are well-optimized

### JS Execution Cost (D — 40/100)

*2123ms total JS execution*

- **[WARNING]** https://vu.nl/nl: 619ms CPU time
- **[WARNING]** https://vu.nl/assets/js/site.min.js?v=e6f1d991: 411ms CPU time
- **[WARNING]** https://vu.nl/widgets/v1/js/vendors.min.js?v=e6f1d...: 365ms CPU time
- **[WARNING]** Unattributable: 355ms CPU time
- **[INFO]** https://vu.nl/widgetspersonal/v1/js/vendors.min.js...: 126ms CPU time
- **[INFO]** Third-party scripts: 355ms (17% of total)

### Font Loading (A+ — 100/100)

*5 fonts (518 KB)*

- **[INFO]** 5 font(s) use font-display: swap (FOUT risk but functional)

### JS Bundles (F — 20/100)

*8 scripts, 1.7 MB unused*

- **[WARNING]** https://vu.nl/widgets/v1/js/vendors.min.js?v=e6f1d...: 495 KB unused (64%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://vu.nl/assets/js/site.min.js?v=e6f1d991: 376 KB unused (66%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://vu.nl/widgetspersonal/v1/js/vendors.min.js...: 349 KB unused (86%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://vu.nl/widgetspersonal-vue3/v1/widgets.pers...: 272 KB unused (72%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://vu.nl/widgets/v1/js/widgets.js?v=e6f1d991: 160 KB unused (77%) — Consider code splitting or tree shaking to reduce unused code.
- **[INFO]** Total unused JavaScript: 1.7 MB

### Resource Caching (A+ — 100/100)

*All resources properly cached*

- **[PASS]** No caching issues found

### Critical Rendering Path (A+ — 100/100)

*No render-blocking resources*

- **[PASS]** No render-blocking resources detected

### Resource Hints (A+ — 100/100)

*No optimization needed*

- **[PASS]** No resource hint issues

### Page Weight Inventory (F — 30/100)

*37 resources · 5.0 MB · 1.7 MB savings available*

- **[WARNING]** Page weight 4.0 MB over 1MB target
- **[INFO]** ~1.7 MB of savings available
- **[INFO]** 18 third-party resources (21% of weight)
- **[INFO]** 7 resources over 200KB

### Render-Blocking Resources (A+ — 100/100)

*No render-blocking resources detected*

- **[PASS]** No render-blocking resources detected in <head>

### Third-Party Resources (A+ — 100/100)

*No third-party resources detected*


---

## Content Quality

### Links (F — 38/100)

*177 links checked, 75 healthy, 101 broken*

- **[CRITICAL]** 75 of 177 links are healthy
- **[INFO]** Long redirect chain: https://vu.nl/nl/dashboard?return_URL=/nl (3 hops)
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/wellbeing-week-2026-denk-mee — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-w-p-geuverink — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/experienced-protest-first-ha... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/bytes-bites-datahack — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/oratie-prof-dr-ir-a-hillebrand — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/3d-chess-tournament-28-04-2026 — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/book-club-the-fire-next-time-2 — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-b-a-laing — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/3d-dnd-night-29-04-2026 — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-j-s-huckins — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-w-j-claassen — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-m-thode — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-k-h-lam — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-f-o-sefiloglu — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-s-j-willems — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/community-service-learning-m... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/colloquium-with-paul-jansen-... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-n-abedini — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/referencing-with-endnote-men... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/low-volume-coding-mei1 — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/oratie-prof-dr-o-o-versolato — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/symposium-onsterfelijke-dood... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-g-g-cortez-vazquez — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-f-hoexum — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/oratie-prof-dr-a-thijs — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-c-r-johnson — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/informatiesessie-over-erc-sy... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-b-j-thijs — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-g-b-banava — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/active-bystander-training-st... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-e-m-j-lammers — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/active-bystander-training-st... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-i-garajova — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-a-m-beukers — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-t-m-n-manshanden — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/book-club-the-fire-next-time-3 — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-d-c-kieslinger — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-e-eigenhuis — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-l-p-silvestrin — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-b-p-colgan — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-j-hooftman — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-s-h-m-kremers — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-r-j-m-h-de-greef — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-j-f-m-smits — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/verantwoord-toetsen-in-tijde... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-a-m-de-haas — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/forum-romanum-lezing-door-dr... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-t-a-karaguzel — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-h-d-mendoza — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-g-jonker — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-s-a-van-eeghen — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-u-n-winardi — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-v-h-de-kleijne — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-e-m-k-de-wit — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-e-m-k-wit — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/low-volume-coding-mei2 — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/open-avond-donderdag-21-mei-... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/workshop-opruimen-van-curric... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-l-n-c-boyd — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-l-kostense — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/oratie-prof-dr-r-j-allan — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/impact-conversations-for-pos... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-c-f-roth — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-k-a-spit — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/aurora-symposium-over-wereld... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-v-m-cozijn — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-r-p-amier — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-e-vermeer — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-n-g-cartier — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/msc-marketing-alumni-event — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/training-jaargesprekken-voor... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-a-galakhova — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-r-s-weller — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/oratie-prof-dr-r-b-veenhuizen — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/promotie-a-matano — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/alumnibijeenkomst-sociologie — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/afscheidsrede-prof-dr-a-r-j-... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/bip-over-louis-aan-de-vrije-... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/referencing-with-endnote-men... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/seminar-accountancy-en-anti-... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/gebruik-de-formatieve-dialoo... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/training-oog-voor-sociale-ve... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/informatievaardigheden-2-opz... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/onderzoeksbijeenkomst-sobr — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/training-krachtig-omgaan-met... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/dag-van-de-filantropie-2026 — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/3d-open-stage-26-06-2026 — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/talma-congres-zorg-onder-dru... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/ethno-discourse-conference-2026 — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/vu-amsterdam-zomerschool-2026 — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/maak-je-vu-canvascursus-comp... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/oaj-2026-2027 — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/training-jaargesprekken-voor... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/leadership-in-science-leadin... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/vitaal-werken-en-de-overgang — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/martin-luther-king-lezing-2026 — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/vu-bachelordag-6-en-7-novemb... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/dies-natalis-2026 — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/symposium-onderzoek-in-het-g... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/online-masterevent-26-novemb... — Found in <a href>. Returns HTTP 503.
- **[CRITICAL]** Broken link: https://vu.nl/nl/agenda/2026/time-management-and-work-pre... — Found in <a href>. Returns HTTP 503.

### Mixed Content (A+ — 100/100)

*No mixed content detected — all resources use HTTPS.*

- **[PASS]** No mixed content detected — all resources use HTTPS

### Open Graph (A+ — 100/100)

*Open Graph tags are well configured for social sharing.*


### Structured Data (C — 40/100)

*No structured data (JSON-LD) found.*

- **[INFO]** No structured data (JSON-LD) found — Adding structured data helps search engines understand your content and can enable rich results.

---

## Infrastructure

### DNS Records (A — 85/100)

*1 A records, 560 ms lookup*

- **[PASS]** Resolves to 1 IPv4 address(es)
- **[INFO]** Single A record — no DNS redundancy — Multiple A records provide failover if one server goes down.
- **[INFO]** No IPv6 (AAAA) records
- **[PASS]** 2 nameserver(s) configured
- **[PASS]** 1 mail exchanger(s) configured
- **[INFO]** CAA records not checked — CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
- **[PASS]** SPF record present in TXT
- **[WARNING]** DNS resolution is slow (560 ms) — Slow DNS adds latency to every page load. Consider a faster DNS provider.

### Redirect Chain (A — 90/100)

*1 redirect(s), 699 ms total*

- **[PASS]** Single redirect
- **[INFO]** Uses 302 (temporary) redirect — If permanent, use 301 instead.
- **[INFO]** Redirect overhead: 699 ms total

### IPv6 Readiness (C — 60/100)

*No IPv6 support*

- **[INFO]** No IPv6 (AAAA) records found — IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

### Crawlability (A+ — 95/100)

*robots.txt present, sitemap with 23445 URLs*

- **[PASS]** robots.txt is present
- **[PASS]** sitemap.xml is present
- **[PASS]** sitemap.xml is valid XML
- **[PASS]** sitemap.xml contains 23445 entries
- **[INFO]** robots.txt does not reference a sitemap — Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

### URL Variants (A — 90/100)

*www/non-www, trailing slash, HTTP→HTTPS*

- **[PASS]** www/non-www redirect configured correctly (preferred: non-www)
- **[WARNING]** HTTP→HTTPS redirect uses 302 instead of 301

### Domain Intelligence (A+ — 100/100)

*vu.nl — via SURF B.V., 37 years, 8 months old, hosted on Microsoft Azure*

- **[PASS]** DNSSEC is enabled
- **[PASS]** Registrar: SURF B.V.
- **[WARNING]** Registrar lock is NOT enabled — The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
- **[PASS]** Hosting: Microsoft Azure

---

## Compliance

### WCAG Compliance (A+ — 100/100)

*No testable criteria*


### Cookie Consent & Privacy (B — 80/100)

*No consent signals detected*

- **[WARNING]** No privacy policy link detected — A privacy policy page is recommended for transparency and may be legally required.
- **[INFO]** No terms of service link detected
- **[INFO]** No cookie consent banner detected
- **[INFO]** This is an automated check, not legal advice — BeaverCheck detects technical indicators of consent management. This does not constitute a legal compliance assessment. Consult a privacy professional for GDPR/CCPA compliance.

### Language & i18n (A — 90/100)

*Lang attribute present*

- **[PASS]** <html lang> attribute is present
- **[PASS]** <html lang> value is valid
- **[INFO]** No Content-Language HTTP header
- **[INFO]** Language signals are inconsistent — The <html lang> attribute and Content-Language header should agree.

### Readability & Typography (A+ — 100/100)

*Font sizes and tap targets checked*


### Viewport Configuration (A+ — 100/100)

*Viewport properly configured*

- **[PASS]** Viewport meta tag is present
- **[PASS]** width=device-width is set
- **[PASS]** User zooming is allowed

### Third-Party Trackers (C — 55/100)

*5 trackers detected*

- **[INFO]** 5 third-party trackers detected — Found 4 analytics, 0 advertising, 0 marketing, 1 tag manager trackers.
- **[WARNING]** Trackers detected but no cookie policy found — This page loads 5 trackers but no cookie policy was detected. GDPR requires disclosure when using tracking cookies.
- **[WARNING]** Trackers detected but no privacy policy found — Most data protection regulations require a privacy policy when collecting user data via trackers.

### Cookie & Tracker Inventory (A+ — 100/100)

*0 cookies · 5 trackers · 0 pre-consent*

- **[INFO]** 5 third-party tracker(s) detected on page

---

## Legal

### Legal Page Ecosystem (F — 0/100)

*0 of 7 expected legal pages detected*

- **[WARNING]** Privacy Policy not detected — No link matching common Privacy Policy URL patterns or link text was found. Most websites are expected to have a Privacy Policy, especially those collecting user data.
- **[WARNING]** Terms of Service not detected — No link matching common Terms of Service URL patterns or link text was found. Most websites are expected to have a Terms of Service, especially those collecting user data.
- **[INFO]** Cookie Policy not detected — No link matching common Cookie Policy URL patterns or link text was found. Most websites are expected to have a Cookie Policy, especially those collecting user data.
- **[INFO]** Accessibility Statement not detected — No link matching common Accessibility Statement URL patterns or link text was found. Most websites are expected to have a Accessibility Statement, especially those collecting user data.
- **[INFO]** DMCA / Copyright Notice not detected — No link matching common DMCA / Copyright Notice URL patterns or link text was found. Most websites are expected to have a DMCA / Copyright Notice, especially those collecting user data.
- **[INFO]** Refund / Returns Policy not detected — No link matching common Refund / Returns Policy URL patterns or link text was found. Most websites are expected to have a Refund / Returns Policy, especially those collecting user data.
- **[INFO]** Acceptable Use Policy not detected — No link matching common Acceptable Use Policy URL patterns or link text was found. Most websites are expected to have a Acceptable Use Policy, especially those collecting user data.

### Copyright Notice (A+ — 100/100)

*© 2026 - Vrije Universiteit Amsterdam*

- **[PASS]** Copyright notice is up to date — Copyright notice is up to date: © 2026 - Vrije Universiteit Amsterdam
- **[PASS]** Copyright holder: - Vrije Universiteit Amsterdam

### Regulatory Indicators

*1 regulatory indicator(s) detected*

- **[INFO]** This is a technical scan, not a legal assessment — BeaverCheck detects technical indicators that may suggest regulatory relevance. This is not a compliance audit and should not be relied upon for legal decisions. Consult qualified legal counsel for compliance assessments.
- **[INFO]** GDPR indicators detected (moderate confidence) — Indicators suggesting GDPR may be relevant: European TLD detected: .nl. EU General Data Protection Regulation — governs collection and processing of personal data of EU residents.

### Third-Party Data Sharing

*0 third-party service(s) detected*

- **[INFO]** Data inventory for transparency purposes — This inventory identifies third-party services that receive data from your site visitors. Under regulations like GDPR (Article 30), maintaining records of data processing activities is commonly considered a best practice. This automated scan provides a starting point — it may not capture all data flows.
- **[INFO]** No recognized third-party data-sharing services detected — This page does not appear to load external tracking, analytics, or advertising scripts.

### Compliance Badges (C — 55/100)

*0 compliance badge(s) detected*

- **[INFO]** No compliance badges detected — No recognized compliance certification badges or seals were found. This is common — many sites do not display compliance badges.

---

## Availability

### CDN & Delivery (D — 50/100)

*No CDN detected*

- **[WARNING]** No CDN detected — A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.

### HTTP Caching (F — 30/100)

*No cache headers*

- **[WARNING]** No Cache-Control header found — Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

### Transport Security (A — 90/100)

*HTTP/3, HSTS, and TLS version analysis*

- **[INFO]** HTTP/3 (QUIC) not advertised — HTTP/3 eliminates head-of-line blocking. If your CDN supports it, consider enabling it.
- **[PASS]** HSTS enabled (includeSubDomains)
- **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT)

---

## Accessibility

### Landmark Structure (C — 65/100)

*1 landmarks*

- **[PASS]** <main> landmark present
- **[WARNING]** No <nav> landmark found
- **[INFO]** No banner (header) landmark
- **[INFO]** No contentinfo (footer) landmark
- **[WARNING]** Skip navigation link is missing (WCAG 2.4.1) — Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.

### Heading Hierarchy (A+ — 100/100)

*15 headings*

- **[PASS]** Single H1 present

### Alt Text Quality (F — 30/100)

*4 of 5 images have issues*

- **[CRITICAL]** 4 image(s) missing alt attribute — Images without alt text are invisible to screen readers.
- **[CRITICAL]** 4 image-in-link without alt text — An image inside a link with no alt creates an empty link.
- **[PASS]** 1 image(s) with good alt text

### Form Accessibility (B — 70/100)

*2 of 7 controls have issues*

- **[CRITICAL]** 2 control(s) without accessible label — Form controls need a <label>, aria-label, or aria-labelledby for screen readers.
- **[PASS]** 5 control(s) properly labeled

### Link & Button Quality (D — 54/100)

*7 issue(s) across 168 links and 14 buttons*

- **[CRITICAL]** 4 image-only link(s) without alt text — Image-only links need alt text on the image (or aria-label on the link) so screen readers can announce them.
- **[WARNING]** 2 link(s) open in new tab without warning — Add '(opens in new tab)' to link text or aria-label.
- **[CRITICAL]** 7 button(s) with no accessible text — Icon-only buttons need an aria-label so screen readers can announce them.
- **[PASS]** 162 link(s) with descriptive text

---

## UX

### 404 Error Page (B — 70/100)

*HTTP 404, custom page*

- **[PASS]** Correct 404 status code returned
- **[PASS]** Custom styled 404 page
- **[PASS]** Navigation links present on 404 page

### Favicon & Branding (F — 30/100)

*2 icon(s) detected*

- **[PASS]** favicon.ico present at site root
- **[PASS]** HTML icon links detected
- **[INFO]** No apple-touch-icon detected — iOS devices use this when users add your site to their home screen. Add <link rel='apple-touch-icon' sizes='180x180' href='/apple-touch-icon.png'>.

### Web Manifest (D — 40/100)

*Not found*

- **[INFO]** No web manifest found — No manifest at standard paths (/manifest.json, /site.webmanifest). A manifest is optional but enables PWA features like home screen installation and standalone display.

### Dark Mode Support (D — 40/100)

*No dark mode signals*

- **[INFO]** No dark mode signals detected — Consider adding CSS with @media (prefers-color-scheme: dark) and <meta name='color-scheme' content='light dark'>.
- **[INFO]** Detection limited to meta tags and inline styles — External CSS files may contain prefers-color-scheme rules not visible to this scan.

### Print Stylesheet (D — 40/100)

*No print styles*

- **[INFO]** No print-specific styles detected — When users print this page, they get the screen layout including navigation and non-essential elements. Add @media print rules to hide navigation and optimize layout for paper.

### Navigation UX (F — 0/100)

*No navigation patterns*

- **[INFO]** No breadcrumbs, search, or skip link detected — These navigation aids help users orient themselves and find content efficiently, especially on large sites.

---

## SEO

### Canonical URL (A+ — 100/100)

*Properly configured*

- **[PASS]** Canonical tag present
- **[PASS]** Canonical is self-referencing
- **[PASS]** Canonical matches final URL after redirects
- **[PASS]** Canonical target reachable (self-referencing)

### Meta Tags (A — 90/100)

*Title: 28 chars*

- **[PASS]** Page title is set
- **[WARNING]** Title is only 28 characters — consider expanding
- **[INFO]** Title and H1 are identical — Consider differentiating — the title is for search results, the H1 is for the page.

### Content Depth (A+ — 100/100)

*2265 words, Difficult*

- **[PASS]** Page has 2265 words — good depth for search engines
- **[INFO]** Reading level: Difficult (grade 11)

### Internal Links (A+ — 100/100)

*166 internal, 2 external*

- **[PASS]** 166 internal links (99%)
- **[PASS]** 100% of links use descriptive anchor text
- **[INFO]** 166 internal / 2 external links

### Image SEO (A+ — 95/100)

*5 images, 5 descriptive filenames*

- **[PASS]** All images have descriptive filenames
- **[INFO]** 4 image(s) missing alt text — see Accessibility tab

### Hreflang

*0 hreflang tags*


---

## Sustainability

### CO2 Per Page Load (D — 50/100)

*1.42g CO2 per view*

- **[WARNING]** 1.42g CO2 per page view — This page transfers 5.0 MB, producing an estimated 1.42g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.26g, network 0.25g, end-user device 0.91g.
- **[INFO]** At 10,000 monthly views: 170.4 kg CO2/year — With 10,000 page views per month, this page would generate approximately 170.4 kg of CO2 annually — equivalent to charging 21304 smartphones.

### Green Hosting (D — 50/100)

*Unknown*

- **[INFO]** Hosting provider could not be identified — Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
- **[INFO]** Green hosting status based on known provider commitments — Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.

### Repeat Visit Weight (A+ — 100/100)

*97% cached*

- **[PASS]** 97% reduction on repeat visits — Returning visitors download only 155 KB (vs 5135 KB first visit). 36 of 37 resources are served from browser cache, saving 1.38g CO2 per repeat visit.
- **[INFO]** Repeat visit: 0.04g CO2 (first visit: 1.42g)

### Carbon Budget (F — 30/100)

*73th percentile*

- **[WARNING]** 1.42g CO2 — above the median website (0.60g) — Heavier than an estimated 27% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
- **[INFO]** Estimated 73th percentile — Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

### Transfer Efficiency (C — 60/100)

*67% efficient*

- **[WARNING]** Transfer efficiency: 67% — An estimated 1703 KB (33%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1703 KB of unused JavaScript. This wasted data produces 0.47g of unnecessary CO2 per page view.

---

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*Generated by [BeaverCheck](https://beavercheck.com) — https://beavercheck.com/results/df402815-a81e-4fa9-b1fd-5121d3d20332*
