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commoncrawl.org
Common Crawl - Open Repository of Web Crawl Data
Last scanned Aug 3, 2026, 5:00 AM · 5 views
Overall score
Great
Summary
We build and maintain an open repository of web crawl data that can be accessed and analyzed by anyone. This website uses jQuery behind Cloudflare CDN. SEO is good (80/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance excellent (100/100). Top issue: No structured data (JSON-LD) found.
We build and maintain an open repository of web crawl data that can be accessed and analyzed by anyone.
Top issues to fix
7 issues found · 1 high priority
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.
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.
+1 more issue — details in the sections below.
SEO
3 issue(s) found
Performance
32 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
-3 overall since Jul 26, 2026
- Overall
- 88
- SEO
- 80
- Security
- 75
- Performance
- 100
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
We build and maintain an open repository of web crawl data that can be accessed and analyzed by anyone.
Meta tags
- Title
- Common Crawl - Open Repository of Web Crawl Data
- Description
- We build and maintain an open repository of web crawl data that can be accessed and analyzed by anyone.
- Canonical
- https://commoncrawl.org
- 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
- commoncrawl.org
- Valid from
- Jul 1, 2026
- Valid to
- Sep 29, 2026
- Days until expiry
- 57
- SAN domains
- commoncrawl.org
Security headers
- Strict-Transport-SecurityEnabled
- 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 10 · H3 36
Links
23 internal · 19 external · 20 broken
Images
7 total · 0 missing alt
Scripts / Styles
7 scripts · 1 stylesheets
JS / CSS size
437 B · 1.5 KB
Page size
26.2 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- 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://commoncrawl.org
- Final URL
- https://commoncrawl.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 32 ms
- HTML size
- 26.2 KB
- Redirect chain
- https://commoncrawl.org
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does commoncrawl.org use?
- commoncrawl.org is built with jQuery.
- Is commoncrawl.org secure (HTTPS)?
- Yes. commoncrawl.org uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 29, 2026.
- Who hosts commoncrawl.org?
- Hosting provider information for commoncrawl.org is not available yet.
- What is commoncrawl.org's SEO score?
- commoncrawl.org scored 80/100 for SEO in the latest analysis (great).
- What is commoncrawl.org's overall website score?
- commoncrawl.org has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.
- Has commoncrawl.org's score changed over time?
- commoncrawl.org's overall score has declined by 3 points (from 91 to 88) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card