loc.gov
Home | Library of Congress
Last scanned Jul 29, 2026, 11:00 AM · 19 views
Overall score
Excellent
Summary
The world's largest library. This website uses Shopify behind Cloudflare CDN. SEO is good (75/100) and accessibility is excellent (100/100). Security scores excellent (100/100) and performance excellent (100/100). Top issue: Missing canonical link.
The world's largest library. View historic photos, maps, books and more. Contact experts for help with research. Plan a visit. Home of U.S. Copyright Office.
Top issues to fix
5 issues found
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
20 broken links on the page
SEOFix or remove broken links — they waste crawl budget and erode user trust.
SEO
4 issue(s) found
Performance
56 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
+7 overall since Jul 15, 2026
- Overall
- 93
- SEO
- 75
- Security
- 100
- Performance
- 100
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
The world's largest library. View historic photos, maps, books and more. Contact experts for help with research. Plan a visit. Home of U.S. Copyright Office.
Meta tags
- Title
- Home | Library of Congress
- Description
- The world's largest library. View historic photos, maps, books and more. Contact experts for help with research. Plan a visit. Home of U.S. Copyright Office.
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width,initial-scale=1
- Robots meta
- Manifest
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
- www.loc.gov
- Valid from
- Jun 14, 2026
- Valid to
- Sep 12, 2026
- Days until expiry
- 44
- SAN domains
- www.loc.gov
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyEnabled
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyMissing
Compression: none · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 9 · H3 2
Links
82 internal · 24 external · 20 broken
Images
76 total · 0 missing alt
Scripts / Styles
8 scripts · 2 stylesheets
JS / CSS size
4.5 KB · 1.1 KB
Page size
87.8 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing canonical link
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://loc.gov
- Final URL
- https://www.loc.gov/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 55 ms
- HTML size
- 87.8 KB
- Redirect chain
- https://loc.gov → https://www.loc.gov/
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Frequently asked questions
- What technology does loc.gov use?
- loc.gov is built with Shopify, jQuery.
- Is loc.gov secure (HTTPS)?
- Yes. loc.gov uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 12, 2026.
- Who hosts loc.gov?
- Hosting provider information for loc.gov is not available yet.
- What is loc.gov's SEO score?
- loc.gov scored 75/100 for SEO in the latest analysis (fair).
- What is loc.gov's overall website score?
- loc.gov has an overall SiteGraph score of 93/100, combining SEO, performance, security, and accessibility.
- Has loc.gov's score changed over time?
- loc.gov's overall score has improved by 7 points (from 86 to 93) since Jul 15, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card