worldcat.org
WorldCat.org
Last scanned Jul 29, 2026, 3:00 PM · 10 views
Overall score
Great
Summary
WorldCat.org is a global catalog of library materials. This website uses Next.js behind Cloudflare CDN. SEO is good (85/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance excellent (90/100). Top issue: Missing canonical link.
WorldCat.org is a global catalog of library materials. You can search for books, music, video, articles and much more at libraries near you.
Top issues to fix
8 issues found · 2 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
+2 more issues — details in the sections below.
SEO
3 issue(s) found
Performance
476 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
-3 overall since Jul 21, 2026
- Overall
- 84
- SEO
- 85
- Security
- 65
- Performance
- 90
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- WorldCat.org
- Description
- WorldCat.org is a global catalog of library materials. You can search for books, music, video, articles and much more at libraries near you.
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- minimum-scale=1, initial-scale=1, width=device-width
- Robots meta
- NOARCHIVE
- Manifest
- https://search.worldcat.org/favicons/site.webmanifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- Cloudflare
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- worldcat.org
- Valid from
- Jul 7, 2026
- Valid to
- Oct 5, 2026
- Days until expiry
- 67
- SAN domains
- worldcat.org, *.worldcat.org, link-sandbox.worldcat.org, *.sandbox.worldcat.org, *.account-sandbox.worldcat.org, *.authn-sandbox.worldcat.org, *.on-sandbox.worldcat.org, *.sd00-sandbox.worldcat.org, *.platform-sandbox.worldcat.org, *.share-sandbox.worldcat.org
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 1 · H2 9 · H3 21
Links
36 internal · 15 external · 20 broken
Images
40 total · 0 missing alt
Scripts / Styles
24 scripts · 2 stylesheets
JS / CSS size
314 KB · 45.7 KB
Page size
445 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing canonical link
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://worldcat.org
- Final URL
- https://search.worldcat.org/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 467 ms
- HTML size
- 445 KB
- Redirect chain
- https://worldcat.org → https://search.worldcat.org/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does worldcat.org use?
- worldcat.org is built with Next.js, Cloudflare Analytics.
- Is worldcat.org secure (HTTPS)?
- Yes. worldcat.org uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 5, 2026.
- Who hosts worldcat.org?
- Hosting provider information for worldcat.org is not available yet.
- What is worldcat.org's SEO score?
- worldcat.org scored 85/100 for SEO in the latest analysis (great).
- What is worldcat.org's overall website score?
- worldcat.org has an overall SiteGraph score of 84/100, combining SEO, performance, security, and accessibility.
- Has worldcat.org's score changed over time?
- worldcat.org's overall score has declined by 3 points (from 87 to 84) since Jul 21, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card