# BeaverCheck Audit Report — https://www.codepen.io **Date:** April 7, 2026 **URL:** https://www.codepen.io **Overall Grade:** C (70/100) **Report:** https://beavercheck.com/results/f1895171-8f52-522b-8718-d5f826b30f72 ## 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]** No favicon or icon links detected — Accessibility > Favicon & Branding 4. **[WARNING]** Cross-Origin-Embedder-Policy header is missing — Security > Security Headers 5. **[WARNING]** Cross-Origin-Opener-Policy header is missing — Security > Security Headers --- ## Lighthouse Scores | Category | Score | |----------|-------| | Performance | 34 | | Accessibility | 86 | | Best Practices | 81 | | SEO | 92 | --- ## Security ### Security Headers (F — 30/100) *3 of 10 headers properly configured* - **[PASS]** Strict-Transport-Security is properly configured - **[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. - **[PASS]** X-Powered-By header is not present - **[PASS]** Server header is present without version info ### 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 69 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 (F — 20/100) *0 of 1 external resources have SRI* - **[WARNING]** External script from challenges.cloudflare.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code. ### 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 (D — 40/100) *2.6 MB transferred, 65 requests* - **[WARNING]** Page weighs 6.5 MB (2.6 MB transferred) - **[WARNING]** Images are 1.3 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]** 65 HTTP requests - **[INFO]** Estimated 0.54 g CO2 per page load ### Third-Party Impact (D — 50/100) *100% third-party, 0 ms blocking* - **[WARNING]** Third-party code accounts for 100% of page weight (2.6 MiB of 2.6 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) *35 images, 0 KB saveable* - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/icon-b... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/icon-l... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://static4.buysellads.net/uu/7/173968/1774279... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/editor... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/square... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://static4.buysellads.net/uu/7/173968/1774279... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/icon-s... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/adobe-... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/editor... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/grubhu... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/airbnb... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/ibm-c6... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/editor... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/netfli... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/micros... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/editor... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/editor... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/salesf... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/lyft-8... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/editor... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS. ### JS Execution Cost (F — 20/100) *3966ms total JS execution* - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/js/ven...: 1162ms CPU time - **[WARNING]** https://codepen.io/: 1003ms CPU time - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/js/eve...: 648ms CPU time - **[WARNING]** Unattributable: 618ms CPU time - **[WARNING]** https://codepen.io/cdn-cgi/challenge-platform/scri...: 349ms CPU time - **[WARNING]** Third-party scripts: 3966ms (100% of total) ### Font Loading (A+ — 100/100) *6 fonts (165 KB)* - **[INFO]** 6 font(s) use font-display: swap (FOUT risk but functional) ### JS Bundles (F — 20/100) *9 scripts, 642 KB unused* - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/js/ven...: 424 KB unused (64%) — Consider code splitting or tree shaking to reduce unused code. - **[WARNING]** https://cpwebassets.codepen.io/assets/packs/js/6-7...: 218 KB unused (65%) — 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) *No optimization needed* - **[PASS]** No resource hint issues ### Render-Blocking Resources (A+ — 100/100) *No render-blocking resources detected* - **[PASS]** No render-blocking resources detected in ### Third-Party Resources (A+ — 100/100) *No third-party resources detected* --- ## Content Quality ### Links (A+ — 100/100) *4 links checked, 4 healthy, 0 broken* - **[PASS]** 4 of 4 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 (F — 0/100) *No Open Graph tags found — social sharing previews will be generic.* - **[WARNING]** No Open Graph meta tags found — Without og:title, og:description, and og:image, social media platforms will generate a generic preview when your page is shared. ### 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 — 90/100) *2 A records, 32 ms lookup* - **[PASS]** Resolves to 2 IPv4 address(es) - **[PASS]** Has 2 IPv6 (AAAA) record(s) - **[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: 32 ms ### Redirect Chain (A — 90/100) *1 redirect(s), 154 ms total* - **[PASS]** Single redirect - **[INFO]** WWW normalization redirect ### IPv6 Readiness (A+ — 100/100) *IPv6 reachable (17 ms)* - **[PASS]** IPv6 is configured and reachable at 2606:4700::6810:a320, 2606:4700::6810:9320 ### Crawlability (B — 80/100) *robots.txt present, no sitemap* - **[PASS]** robots.txt is present - **[INFO]** No sitemap.xml found — A sitemap helps search engines discover and index your pages more efficiently. - **[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+ — 100/100) *www/non-www, trailing slash, HTTP→HTTPS* - **[PASS]** HTTP correctly 301-redirects to HTTPS ### Domain Intelligence (A+ — 100/100) *codepen.io — via Gandi SAS, 14 years, 3 months old* - **[PASS]** Domain registered until Feb 26, 2028 (1 years, 10 months remaining) - **[PASS]** Registrar: Gandi SAS --- ## Compliance ### WCAG Compliance (A+ — 100/100) *No testable criteria* ### Cookie Consent & Privacy (A+ — 95/100) *privacy policy found* - **[PASS]** Privacy policy link found - **[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]** attribute is present - **[PASS]** value is valid - **[INFO]** No Content-Language HTTP header - **[INFO]** Language signals are inconsistent — The 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 https://www.cloudflare.com/privacypolicy/, 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 *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: Privacy policy page found. EU General Data Protection Regulation — governs collection and processing of personal data of EU residents. ### Third-Party Data Sharing *1 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]** 1 third-party services across 1 categories — 1 third-party services detected across 1 categories: CDN (1). Each of these services receives some user data from your site visitors. - **[INFO]** Cloudflare (CDN) — Detected via script URL. Typically collects: IP address (transient), Request metadata. Privacy policy: https://www.cloudflare.com/privacypolicy/. Data Processing Agreement available. ### 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 (B — 80/100) *Cloudflare* - **[PASS]** Site is served via Cloudflare CDN (edge: CDG) ### 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+ — 100/100) *HTTP/3, HSTS, and TLS version analysis* - **[PASS]** HTTP/3 (QUIC) supported — The server advertises HTTP/3 via Alt-Svc for faster connections on mobile networks. - **[PASS]** HSTS enabled (includeSubDomains, preload) - **[PASS]** HSTS preload enabled - **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT) --- ## Accessibility ### Landmark Structure (B — 70/100) *2 landmarks* - **[PASS]**
landmark present - **[WARNING]** No