# BeaverCheck Audit Report — https://www.data.gouv.fr

**Date:** April 7, 2026  
**URL:** https://www.data.gouv.fr  
**Overall Grade:** C (73/100)  
**Report:** https://beavercheck.com/results/84c7a05a-03f2-4a2b-c9ad-d042b049461c

## 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]** 2 button(s) with no accessible text — Accessibility > Link & Button Quality
4. **[CRITICAL]** 2 image-only link(s) without alt text — Accessibility > Link & Button Quality
5. **[CRITICAL]** No <main> landmark found — Accessibility > Landmark Structure

---

## Lighthouse Scores

| Category | Score |
|----------|-------|
| Performance | 31 |
| Accessibility | 93 |
| Best Practices | 100 |
| SEO | 100 |

---

## Security

### Security Headers (F — 10/100)

*0 of 10 headers properly configured*

- **[WARNING]** HSTS max-age is too short (86400s, should be ≥ 31536000s) — A short max-age leaves a window for downgrade attacks. Set max-age to at least 31536000 (1 year).
- **[WARNING]** X-Content-Type-Options header is missing — This header prevents MIME-type sniffing, which can lead to XSS attacks. Set it to 'nosniff'.
- **[WARNING]** X-Frame-Options header is missing — This header prevents clickjacking by controlling who can embed your page in a frame. Set it to DENY or SAMEORIGIN.
- **[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.
- **[WARNING]** X-Powered-By header reveals technology stack — This header discloses server technology (e.g. Express, PHP), helping attackers target known vulnerabilities. Remove it.
- **[WARNING]** Server header reveals version information — The Server header discloses the software version, aiding attackers in targeting known vulnerabilities. Remove the version number.

### 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 63 days)
- **[PASS]** Certificate chain has 4 certificates
- **[PASS]** Certificate uses modern signature algorithm
- **[PASS]** Certificate covers 10 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 (F — 30/100)

*No DMARC*

- **[WARNING]** No DMARC record found — Without DMARC, email receivers have no policy for handling authentication failures.

### 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 — 24/100)

*3.1 MB transferred, 143 requests*

- **[WARNING]** Page weighs 8.6 MB (3.1 MB transferred)
- **[WARNING]** Images are 1.4 MB — compress or use modern formats — Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
- **[WARNING]** JavaScript is 1.0 MB — consider code splitting or lazy loading — Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
- **[INFO]** Fonts are 374 KB — consider subsetting or using system fonts — Subset fonts to include only used characters, or switch to system font stacks.
- **[WARNING]** 143 HTTP requests — consider bundling or reducing — Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
- **[INFO]** Estimated 0.65 g CO2 per page load

### Third-Party Impact (A+ — 100/100)

*3% third-party, 0 ms blocking*

- **[INFO]** Third-party code accounts for 3% of page weight (88.5 KiB of 3.1 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 (C — 60/100)

*20 images, 0 KB saveable*

- **[WARNING]** https://www.data.gouv.fr/_ipx/_/illustrations/data... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://static.data.gouv.fr/images/7c/ed09e56c864b... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.data.gouv.fr/_ipx/_/nuxt_images/logo_t... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://www.data.gouv.fr/_ipx/_/illustrations/disc... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.

### JS Execution Cost (F — 20/100)

*3733ms total JS execution*

- **[WARNING]** Unattributable: 1752ms CPU time
- **[WARNING]** https://www.data.gouv.fr/_nuxt/DeWFfL1o.js: 641ms CPU time
- **[WARNING]** https://www.data.gouv.fr/: 559ms CPU time
- **[WARNING]** https://stats.data.gouv.fr/matomo.js: 514ms CPU time
- **[WARNING]** https://www.data.gouv.fr/_nuxt/entry.BmkqFH0c.css: 266ms CPU time
- **[WARNING]** Third-party scripts: 2266ms (61% of total)

### Font Loading (A+ — 100/100)

*7 fonts (374 KB)*

- **[INFO]** 7 font(s) use font-display: swap (FOUT risk but functional)

### JS Bundles (F — 20/100)

*101 scripts, 642 KB unused*

- **[WARNING]** https://www.data.gouv.fr/_nuxt/DeWFfL1o.js: 392 KB unused (70%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://www.data.gouv.fr/_nuxt/CLIvgYrS.js: 97 KB unused (72%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://www.data.gouv.fr/_nuxt/BIpomotR.js: 84 KB unused (89%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://stats.data.gouv.fr/matomo.js: 25 KB unused (51%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://www.data.gouv.fr/_nuxt/CiafoMRz.js: 21 KB unused (57%) — Consider code splitting or tree shaking to reduce unused code.
- **[INFO]** Total unused JavaScript: 642 KB

### 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)

*13 hints, 0 missing preconnects*

- **[PASS]** Page uses 13 resource hint(s)

### 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 (A+ — 100/100)

*128 links checked, 128 healthy, 0 broken*

- **[PASS]** 128 of 128 links are healthy

### 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.*

- **[INFO]** og:title is long (66 characters) — Titles over 60 characters may be truncated in social sharing previews.

### 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 (B — 80/100)

*2 A records, 28 ms lookup*

- **[PASS]** Resolves to 2 IPv4 address(es)
- **[INFO]** No IPv6 (AAAA) records
- **[WARNING]** CNAME record at zone apex — A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.
- **[INFO]** No NS records found
- **[INFO]** No MX records — email not configured via DNS
- **[INFO]** CAA records not checked — CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
- **[INFO]** No SPF record found in TXT records — SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
- **[PASS]** DNS resolution time: 28 ms

### Redirect Chain (A+ — 100/100)

*No redirects — direct access*

- **[PASS]** No redirects — direct access

### 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+ — 100/100)

*robots.txt present, sitemap with 16 URLs*

- **[PASS]** robots.txt is present
- **[PASS]** sitemap.xml is present
- **[PASS]** sitemap.xml is valid XML
- **[PASS]** sitemap.xml contains 16 entries
- **[PASS]** Sitemap index with 16 child sitemaps
- **[PASS]** robots.txt references sitemap

### URL Variants (A — 90/100)

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

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

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

*data.gouv.fr — via OVH, 15 years, 4 months old, hosted on OVH*

- **[PASS]** Domain registered until Dec 6, 2026 (8 months remaining)
- **[PASS]** Registrar: OVH
- **[PASS]** Hosting: OVH

---

## 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 (A+ — 100/100)

*No third-party trackers detected*

- **[PASS]** No third-party trackers detected

---

## Legal

### Legal Page Ecosystem (F — 35/100)

*1 of 7 expected legal pages detected*

- **[PASS]** Privacy Policy detected — Found at /pages/suivi, linked from footer.
- **[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 (C — 55/100)

*No copyright notice detected*

- **[INFO]** No copyright notice detected — No copyright notice detected in the page content. While not legally required in most jurisdictions (copyright exists automatically), a notice is standard practice and signals site ownership.

### Regulatory Indicators

*2 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: .fr. EU General Data Protection Regulation — governs collection and processing of personal data of EU residents.
- **[INFO]** ADA indicators detected (moderate confidence) — Indicators suggesting ADA may be relevant: Accessibility statement page found. Americans with Disabilities Act / Section 508 — requires digital accessibility for people with disabilities.

### 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 (B — 70/100)

*public*

- **[PASS]** Cache-Control header is set
- **[INFO]** No ETag or Last-Modified header — Conditional requests (304 Not Modified) are not possible without validators.

### Transport Security (B — 75/100)

*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.
- **[WARNING]** HSTS max-age is short: 1 days — HSTS max-age should be at least 1 year (31536000 seconds).
- **[PASS]** HSTS preload enabled
- **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT)

---

## Accessibility

### Landmark Structure (C — 60/100)

*4 landmarks*

- **[CRITICAL]** No <main> landmark found — Screen reader users cannot quickly navigate to the primary content. Wrap your main content in <main>.
- **[PASS]** 1 <nav> landmark(s) found
- **[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)

*18 headings*

- **[PASS]** Single H1 present

### Alt Text Quality (A+ — 100/100)

*All 18 images OK*

- **[PASS]** 10 decorative image(s) correctly marked
- **[PASS]** 8 image(s) with good alt text

### Form Accessibility (A — 92/100)

*1 of 1 controls have issues*

- **[WARNING]** 1 control(s) rely on placeholder only — Placeholder text disappears on focus and is not a reliable label.

### Link & Button Quality (D — 48/100)

*2 issue(s) across 68 links and 3 buttons*

- **[CRITICAL]** 2 image-only link(s) without alt text
- **[WARNING]** 10 link(s) open in new tab without warning — Add '(opens in new tab)' to link text or aria-label.
- **[CRITICAL]** 2 button(s) with no accessible text
- **[PASS]** 56 link(s) with descriptive text

---

## UX

### 404 Error Page (F — 30/100)

*HTTP 404, bare page*

- **[PASS]** Correct 404 status code returned
- **[WARNING]** Bare server default 404 page — The 404 page has no custom styling. Users hitting a broken link see a generic error with no way to navigate back. Add a custom 404 page with your site navigation and a search bar.

### Favicon & Branding (F — 25/100)

*1 icon(s) detected*

- **[WARNING]** No favicon.ico at site root — Some older browsers, bookmark tools, and RSS readers look for /favicon.ico. Add one as a fallback.
- **[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'>.
- **[PASS]** SVG favicon detected — scales perfectly to any size

### 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 — 15/100)

*No navigation patterns*

- **[PASS]** 1 navigation landmark(s) detected
- **[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 (B — 80/100)

*Minor issues*

- **[WARNING]** No canonical tag found — Search engines will determine the canonical URL themselves, which may cause duplicate content issues.

### Meta Tags (A+ — 100/100)

*Title: 68 chars*

- **[PASS]** Page title is set
- **[INFO]** Title is 68 characters — may be truncated in search results
- **[PASS]** Title and H1 are well-aligned

### Content Depth (C — 65/100)

*589 words, Very Difficult*

- **[PASS]** Page has 589 words of content
- **[INFO]** Text-to-HTML ratio is 2% — Very low ratio suggests heavy framework overhead or boilerplate.
- **[INFO]** Reading level: Very Difficult (grade 11)

### Internal Links (A+ — 100/100)

*34 internal, 34 external*

- **[PASS]** 34 internal links (50%)
- **[PASS]** 100% of links use descriptive anchor text
- **[INFO]** 34 internal / 34 external links

### Image SEO (A+ — 95/100)

*18 images, 17 descriptive filenames*

- **[INFO]** 1 image(s) have hash/generic filenames
- **[INFO]** 3 image(s) missing alt text — see Accessibility tab

### Hreflang

*0 hreflang tags*


---

## Sustainability

### CO2 Per Page Load (B — 70/100)

*0.73g CO2 per view*

- **[INFO]** 0.73g CO2 per page view — This page transfers 3.1 MB, producing an estimated 0.73g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.15g, end-user device 0.56g.
- **[INFO]** At 10,000 monthly views: 87.7 kg CO2/year — With 10,000 page views per month, this page would generate approximately 87.7 kg of CO2 annually — equivalent to charging 10957 smartphones.
- **[PASS]** Green hosting reduces data center emissions

### Green Hosting (B — 80/100)

*Green (hosting)*

- **[PASS]** OVHcloud uses renewable energy
- **[INFO]** OVHcloud: Verified by the Green Web Foundation
- **[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)

*98% cached*

- **[PASS]** 98% reduction on repeat visits — Returning visitors download only 58 KB (vs 3160 KB first visit). 142 of 143 resources are served from browser cache, saving 0.72g CO2 per repeat visit.
- **[INFO]** Repeat visit: 0.01g CO2 (first visit: 0.73g)

### Carbon Budget (D — 50/100)

*53th percentile*

- **[WARNING]** 0.73g CO2 — above the median website (0.60g) — Heavier than an estimated 47% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
- **[INFO]** Estimated 53th percentile — Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

### Transfer Efficiency (B — 80/100)

*80% efficient*

- **[INFO]** Transfer efficiency: 80% — An estimated 641 KB (20%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 641 KB of unused JavaScript. This wasted data produces 0.15g of unnecessary CO2 per page view.

---

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*Generated by [BeaverCheck](https://beavercheck.com) — https://beavercheck.com/results/84c7a05a-03f2-4a2b-c9ad-d042b049461c*
