# BeaverCheck Audit Report — https://openlibrary.org

**Date:** April 21, 2026  
**URL:** https://openlibrary.org  
**Overall Grade:** C (74/100)  
**Report:** https://beavercheck.com/results/cc565dab-ab79-4b22-a479-44d0bb224150

## Top Findings

1. **[CRITICAL]** Content-Security-Policy header is missing — Security > Security Headers
2. **[CRITICAL]** HSTS header is missing — Security > Security Headers
3. **[CRITICAL]** No Content-Security-Policy header found — Security > Content Security Policy
4. **[CRITICAL]** 1 link(s) with no accessible text — Accessibility > Link & Button Quality
5. **[CRITICAL]** 26 image-only link(s) without alt text — Accessibility > Link & Button Quality

---

## Lighthouse Scores

| Category | Score |
|----------|-------|
| Performance | 53 |
| Accessibility | 94 |
| Best Practices | 96 |
| SEO | 92 |

---

## Security

### Security Headers (F — 15/100)

*2 of 10 headers properly configured*

- **[CRITICAL]** HSTS header is missing — Strict-Transport-Security forces browsers to use HTTPS, preventing downgrade attacks. Add the header with a max-age of at least 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.
- **[PASS]** Referrer-Policy is properly configured
- **[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
- **[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 40 days)
- **[PASS]** Certificate chain has 2 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 apollo.archive.org 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 (A — 85/100)

*1.0 MB transferred, 112 requests*

- **[PASS]** Page weighs 1.7 MB (1.0 MB transferred)
- **[WARNING]** 112 HTTP requests — consider bundling or reducing — Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
- **[INFO]** Estimated 0.22 g CO2 per page load

### Third-Party Impact (D — 50/100)

*65% third-party, 0 ms blocking*

- **[WARNING]** Third-party code accounts for 65% of page weight (686.9 KiB of 1.0 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 (C — 60/100)

*68 images, 0 KB saveable*

- **[WARNING]** https://covers.openlibrary.org/b/id/6577620-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/15213202-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://openlibrary.org/static/images/onboarding/f... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/8011068-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/8295312-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/8174154-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://openlibrary.org/static/images/ia-logo.svg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/15206128-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/2640456-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://openlibrary.org/static/images/onboarding/r... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://openlibrary.org/static/images/onboarding/f... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/15143630-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/8351540-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://openlibrary.org/static/images/onboarding/v... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://openlibrary.org/images/ajax-loader-bar.gif is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEA... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/12622155-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/12621740-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/15200982-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/15178699-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://openlibrary.org/static/images/hamburger-ic... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://openlibrary.org/static/images/onboarding/r... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/1129099-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/12659488-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://openlibrary.org/static/images/onboarding/l... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://openlibrary.org/static/images/onboarding/l... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/7361792-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]**  is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://openlibrary.org/static/images/language-ico... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/6875249-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://openlibrary.org/static/images/onboarding/t... is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/12621834-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/6691721-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/1738958-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/8788253-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.
- **[WARNING]** https://covers.openlibrary.org/b/id/11464624-M.jpg is missing width/height — may cause layout shift — Set explicit width and height to prevent CLS.

### JS Execution Cost (D — 40/100)

*3385ms total JS execution*

- **[WARNING]** https://openlibrary.org/: 1700ms CPU time
- **[WARNING]** Unattributable: 651ms CPU time
- **[WARNING]** https://openlibrary.org/static/build/js/2857.7ae03...: 471ms CPU time
- **[WARNING]** https://openlibrary.org/static/build/js/all.js?v=c...: 445ms CPU time
- **[INFO]** https://openlibrary.org/static/build/js/8839.f8f23...: 118ms CPU time
- **[INFO]** Third-party scripts: 651ms (19% of total)

### Font Loading (A+ — 100/100)

*1 fonts (29 KB)*

- **[INFO]** 1 font(s) use font-display: swap (FOUT risk but functional)

### JS Bundles (B — 80/100)

*20 scripts, 83 KB unused*

- **[WARNING]** https://apollo.archive.org/js/container_7cLc1b4U.j...: 50 KB unused (39%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://openlibrary.org/static/build/js/all.js?v=c...: 33 KB unused (32%) — Consider code splitting or tree shaking to reduce unused code.
- **[INFO]** Total unused JavaScript: 83 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)

*2 hints, 0 missing preconnects*

- **[PASS]** Page uses 2 resource hint(s)

### Page Weight Inventory (A — 85/100)

*112 resources · 1.0 MB · 83 KB savings available*

- **[WARNING]** Page weight 27 KB over 1MB target
- **[INFO]** ~83 KB of savings available
- **[WARNING]** 58 third-party resources (65% of weight)

### 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 — 40/100)

*199 links checked, 94 healthy, 105 broken*

- **[CRITICAL]** 94 of 199 links are healthy
- **[WARNING]** Broken link: https://apollo.archive.org — Found in <link href>. Returns HTTP 460.
- **[WARNING]** Broken link: https://openlibrary.org/cdn/archive.org/donate.js — Found in <script src>. Get "https://openlibrary.org/cdn/archive.org/donate.js": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/barcodescanner?returnTo=/isbn/$$$ — Found in <a href>. Get "https://openlibrary.org/barcodescanner?returnTo=/isbn/$$$": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/account/login — Found in <a href>. Get "https://openlibrary.org/account/login": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/account/create — Found in <a href>. Get "https://openlibrary.org/account/create": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/add — Found in <a href>. Get "https://openlibrary.org/books/add": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/recentchanges — Found in <a href>. Get "https://openlibrary.org/recentchanges": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/help — Found in <a href>. Get "https://openlibrary.org/help": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/developers — Found in <a href>. Get "https://openlibrary.org/developers": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/librarians — Found in <a href>. Get "https://openlibrary.org/librarians": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/help/faq/borrow — Found in <a href>. Get "https://openlibrary.org/help/faq/borrow": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/help/faq/yearly-reading-goals — Found in <a href>. Get "https://openlibrary.org/help/faq/yearly-reading-goals": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/help/faq/reading-log — Found in <a href>. Get "https://openlibrary.org/help/faq/reading-log": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/search/inside — Found in <a href>. Get "https://openlibrary.org/search/inside": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/volunteer — Found in <a href>. Get "https://openlibrary.org/volunteer": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL5303063M — Found in <a href>. Get "https://openlibrary.org/books/OL5303063M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/girlscanbeanythi00klei?... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/girlscanbeanythi00klei?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL24373439M — Found in <a href>. Get "https://openlibrary.org/books/OL24373439M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/conan00howa?ref=ol — Found in <a href>. Get "https://openlibrary.org/borrow/ia/conan00howa?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL678459M — Found in <a href>. Get "https://openlibrary.org/books/OL678459M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/becomingattached00kare?... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/becomingattached00kare?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL971651M — Found in <a href>. Get "https://openlibrary.org/books/OL971651M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/forbiddenknowled00shat?... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/forbiddenknowled00shat?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL26326663M — Found in <a href>. Get "https://openlibrary.org/books/OL26326663M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/isbn_9781877579356?ref=ol — Found in <a href>. Get "https://openlibrary.org/borrow/ia/isbn_9781877579356?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL7506950M — Found in <a href>. Get "https://openlibrary.org/books/OL7506950M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/hitchhikersguide0000ada... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/hitchhikersguide0000adam_h3v6?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL468584M — Found in <a href>. Get "https://openlibrary.org/books/OL468584M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/wutheringheights0000bro... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/wutheringheights0000bron_r3t2?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL30777105M — Found in <a href>. Get "https://openlibrary.org/books/OL30777105M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/stellaluna00jane_0?ref=ol — Found in <a href>. Get "https://openlibrary.org/borrow/ia/stellaluna00jane_0?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL37807643M — Found in <a href>. Get "https://openlibrary.org/books/OL37807643M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/prideprejudice0000unse_... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/prideprejudice0000unse_x0d0?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL36463535M — Found in <a href>. Get "https://openlibrary.org/books/OL36463535M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/signoffour0000doyl_h1h3... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/signoffour0000doyl_h1h3?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL6226003M — Found in <a href>. Get "https://openlibrary.org/books/OL6226003M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/magisterludi00hess?ref=ol — Found in <a href>. Get "https://openlibrary.org/borrow/ia/magisterludi00hess?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL32772713M — Found in <a href>. Get "https://openlibrary.org/books/OL32772713M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/isbn_0816130795?ref=ol — Found in <a href>. Get "https://openlibrary.org/borrow/ia/isbn_0816130795?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL35710955M — Found in <a href>. Get "https://openlibrary.org/books/OL35710955M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/runawayralph0000unse_s4... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/runawayralph0000unse_s4v7?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL2407753M — Found in <a href>. Get "https://openlibrary.org/books/OL2407753M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/fearnoevil00shch_2?ref=ol — Found in <a href>. Get "https://openlibrary.org/borrow/ia/fearnoevil00shch_2?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL26450390M — Found in <a href>. Get "https://openlibrary.org/books/OL26450390M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/bookofbloodfroml0000new... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/bookofbloodfroml0000newq?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL5048437M — Found in <a href>. Get "https://openlibrary.org/books/OL5048437M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/encyclopediaofnu00culi?... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/encyclopediaofnu00culi?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL11276135M — Found in <a href>. Get "https://openlibrary.org/books/OL11276135M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/tenfriends0000gold?ref=ol — Found in <a href>. Get "https://openlibrary.org/borrow/ia/tenfriends0000gold?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL1548764M — Found in <a href>. Get "https://openlibrary.org/books/OL1548764M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/imaginarymuseumo0000goe... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/imaginarymuseumo0000goeh?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL26332666M — Found in <a href>. Get "https://openlibrary.org/books/OL26332666M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/lostchristianiti00ehrm?... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/lostchristianiti00ehrm?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/disneyslittlemer00edga?... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/disneyslittlemer00edga?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL1750738M — Found in <a href>. Get "https://openlibrary.org/books/OL1750738M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/perspectivesinph0000uns... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/perspectivesinph0000unse_c7z2?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL33507M — Found in <a href>. Get "https://openlibrary.org/books/OL33507M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/anthologyofmoder0000uns... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/anthologyofmoder0000unse_e0m0?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL11841731M — Found in <a href>. Get "https://openlibrary.org/books/OL11841731M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/ageofengagereinv0000shi... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/ageofengagereinv0000shif?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL2856261M — Found in <a href>. Get "https://openlibrary.org/books/OL2856261M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/fourseasonsofhou0000uns... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/fourseasonsofhou0000unse?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL24043840M — Found in <a href>. Get "https://openlibrary.org/books/OL24043840M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/ghostinmachine0000carm?... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/ghostinmachine0000carm?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL19479826M — Found in <a href>. Get "https://openlibrary.org/books/OL19479826M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL19479826M/-/borrow?action... — Found in <a href>. Get "https://openlibrary.org/books/OL19479826M/-/borrow?action=locate": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL706792M — Found in <a href>. Get "https://openlibrary.org/books/OL706792M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/arseroticaarousi0000luc... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/arseroticaarousi0000luci?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL810662M — Found in <a href>. Get "https://openlibrary.org/books/OL810662M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/mahatmagandhisel00maha?... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/mahatmagandhisel00maha?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL4417907M — Found in <a href>. Get "https://openlibrary.org/books/OL4417907M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/sermonssocietyan0000wel... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/sermonssocietyan0000wels?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL17210284M — Found in <a href>. Get "https://openlibrary.org/books/OL17210284M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL17210284M/-/borrow?action... — Found in <a href>. Get "https://openlibrary.org/books/OL17210284M/-/borrow?action=locate": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL5078548M — Found in <a href>. Get "https://openlibrary.org/books/OL5078548M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/religiondecline00thom?r... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/religiondecline00thom?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/books/OL7904006M — Found in <a href>. Get "https://openlibrary.org/books/OL7904006M": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/borrow/ia/makingroomrecove0000poh... — Found in <a href>. Get "https://openlibrary.org/borrow/ia/makingroomrecove0000pohl?ref=ol": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/art — Found in <a href>. Get "https://openlibrary.org/subjects/art": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/science_fiction — Found in <a href>. Get "https://openlibrary.org/subjects/science_fiction": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/fantasy — Found in <a href>. Get "https://openlibrary.org/subjects/fantasy": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/biographies — Found in <a href>. Get "https://openlibrary.org/subjects/biographies": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/recipes — Found in <a href>. Get "https://openlibrary.org/subjects/recipes": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/romance — Found in <a href>. Get "https://openlibrary.org/subjects/romance": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/textbooks — Found in <a href>. Get "https://openlibrary.org/subjects/textbooks": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/children — Found in <a href>. Get "https://openlibrary.org/subjects/children": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/history — Found in <a href>. Get "https://openlibrary.org/subjects/history": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/medicine — Found in <a href>. Get "https://openlibrary.org/subjects/medicine": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/religion — Found in <a href>. Get "https://openlibrary.org/subjects/religion": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/mystery_and_detective_st... — Found in <a href>. Get "https://openlibrary.org/subjects/mystery_and_detective_stories": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/plays — Found in <a href>. Get "https://openlibrary.org/subjects/plays": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/music — Found in <a href>. Get "https://openlibrary.org/subjects/music": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/science — Found in <a href>. Get "https://openlibrary.org/subjects/science": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/stats — Found in <a href>. Get "https://openlibrary.org/stats": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/subjects/in_library — Found in <a href>. Get "https://openlibrary.org/subjects/in_library": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/about — Found in <a href>. Get "https://openlibrary.org/about": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/authors — Found in <a href>. Get "https://openlibrary.org/authors": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/about/vision — Found in <a href>. Get "https://openlibrary.org/about/vision": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/partner-with-us — Found in <a href>. Get "https://openlibrary.org/partner-with-us": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/search — Found in <a href>. Get "https://openlibrary.org/search": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/search/authors — Found in <a href>. Get "https://openlibrary.org/search/authors": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/developers/api — Found in <a href>. Get "https://openlibrary.org/developers/api": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/developers/dumps — Found in <a href>. Get "https://openlibrary.org/developers/dumps": context deadline exceeded
- **[CRITICAL]** Broken link: https://openlibrary.org/help/faq/editing — Found in <a href>. Get "https://openlibrary.org/help/faq/editing": context deadline exceeded
- **[WARNING]** Broken link: https://openlibrary.org/cdn/archive.org/athena.js — Found in <script src>. Get "https://openlibrary.org/cdn/archive.org/athena.js": context deadline exceeded

### 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)

*1 A records, 161 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]** 3 nameserver(s) configured
- **[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: 161 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 (B — 70/100)

*robots.txt present, sitemap with 0 URLs*

- **[PASS]** robots.txt is present
- **[PASS]** sitemap.xml is present
- **[WARNING]** sitemap.xml contains invalid XML — Search engines may not be able to parse the sitemap. Fix XML validation errors.
- **[WARNING]** sitemap.xml is empty — no URLs found — An empty sitemap provides no value. Add <url> entries for your pages.
- **[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: non-www)
- **[WARNING]** HTTP→HTTPS redirect uses 302 instead of 301

### Domain Intelligence

*Domain intelligence data not available*


---

## 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)

*3 trackers detected*

- **[INFO]** 3 third-party trackers detected — Found 2 analytics, 0 advertising, 0 marketing, 1 tag manager trackers.
- **[WARNING]** Trackers detected but no cookie policy found — This page loads 3 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 · 3 trackers · 0 pre-consent*

- **[INFO]** 3 third-party tracker(s) detected on page

---

## Legal

### Legal Page Ecosystem (F — 25/100)

*1 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.
- **[PASS]** Terms of Service detected — Found at https://archive.org/about/terms.php.
- **[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]** HIPAA indicators detected (weak confidence) — Indicators suggesting HIPAA may be relevant: Text mentions: phi. Health Insurance Portability and Accountability Act — protects sensitive patient health information.

### 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 (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]** Missing Strict-Transport-Security header — HSTS tells browsers to only use HTTPS, preventing SSL stripping attacks.
- **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT)

---

## Accessibility

### Landmark Structure (B — 75/100)

*5 landmarks*

- **[PASS]** <main> landmark present
- **[WARNING]** No <nav> landmark 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 (B — 75/100)

*13 headings*

- **[CRITICAL]** No H1 heading found — Every page should have one H1 that describes the page content.

### Alt Text Quality (A+ — 100/100)

*All 72 images OK*

- **[PASS]** 29 decorative image(s) correctly marked
- **[PASS]** 43 image(s) with good alt text

### Form Accessibility (A+ — 100/100)

*All 3 controls labeled*

- **[PASS]** 3 control(s) properly labeled

### Link & Button Quality (F — 39/100)

*5 issue(s) across 218 links and 12 buttons*

- **[CRITICAL]** 1 link(s) with no accessible text — Links without text are announced as raw URLs by screen readers.
- **[WARNING]** 1 link(s) with generic text — Generic link text like 'click here' doesn't describe the destination.
- **[CRITICAL]** 26 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]** 3 button(s) with no accessible text — Icon-only buttons need an aria-label so screen readers can announce them.
- **[PASS]** 188 link(s) with descriptive text

---

## UX

### 404 Error Page (A — 90/100)

*HTTP 404, custom page*

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

### Favicon & Branding (B — 80/100)

*11 icon(s) detected*

- **[PASS]** favicon.ico present at site root
- **[PASS]** HTML icon links detected
- **[PASS]** Apple touch icon present
- **[PASS]** Multiple icon sizes detected

### Web Manifest (A+ — 100/100)

*PWA-ready*

- **[PASS]** Meets PWA install criteria
- **[PASS]** Name present: Open Library: A page for every book published
- **[PASS]** 192x192 icon present
- **[PASS]** 512x512 icon present
- **[PASS]** Display mode: standalone

### Dark Mode Support (D — 45/100)

*Theme color only*

- **[INFO]** Theme-color present but no dark variant — A theme-color is set but no dark-specific variant was found. The browser toolbar may not adapt for dark mode users.
- **[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+ — 100/100)

*Title optimized*

- **[PASS]** Page title is set
- **[PASS]** Title length (38 chars) is optimal

### Content Depth (C — 65/100)

*649 words, Difficult*

- **[PASS]** Page has 649 words of content
- **[INFO]** Text-to-HTML ratio is 2% — Very low ratio suggests heavy framework overhead or boilerplate.
- **[INFO]** Reading level: Difficult (grade 14)

### Internal Links (A+ — 95/100)

*193 internal, 25 external*

- **[PASS]** 193 internal links (89%)
- **[PASS]** 99% of links use descriptive anchor text
- **[INFO]** Page has 218 links — consider reducing
- **[INFO]** 193 internal / 25 external links

### Image SEO (A+ — 100/100)

*72 images, 60 descriptive filenames*

- **[INFO]** 12 image(s) have hash/generic filenames

### Hreflang

*0 hreflang tags*


---

## Sustainability

### CO2 Per Page Load (A — 85/100)

*0.29g CO2 per view*

- **[PASS]** 0.29g CO2 per page view — This page transfers 1.0 MB, producing an estimated 0.29g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.05g, network 0.05g, end-user device 0.19g.
- **[INFO]** At 10,000 monthly views: 34.9 kg CO2/year — With 10,000 page views per month, this page would generate approximately 34.9 kg of CO2 annually — equivalent to charging 4361 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)

*98% cached*

- **[PASS]** 98% reduction on repeat visits — Returning visitors download only 17 KB (vs 1051 KB first visit). 110 of 112 resources are served from browser cache, saving 0.29g CO2 per repeat visit.
- **[INFO]** Repeat visit: 0.00g CO2 (first visit: 0.29g)

### Carbon Budget (A — 85/100)

*19th percentile*

- **[PASS]** 0.29g CO2 — below the sustainability target of 0.50g — Cleaner than an estimated 81% of websites analyzed. This page meets the Web Sustainability Guidelines target.
- **[INFO]** Estimated 19th percentile — Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

### Transfer Efficiency (A+ — 100/100)

*92% efficient*

- **[PASS]** Transfer efficiency: 92% — Only 82 KB of potential savings identified. Your page is well-optimized for size.

---

---

*Generated by [BeaverCheck](https://beavercheck.com) — https://beavercheck.com/results/cc565dab-ab79-4b22-a479-44d0bb224150*