debian.org
Debian -- The Universal Operating System
Last scanned Jul 29, 2026, 11:00 AM · 8 views
Overall score
Great
Summary
Debian is an operating system and a distribution of Free Software. This website uses Apache. SEO is fair (60/100) and accessibility is excellent (100/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.
Debian is an operating system and a distribution of Free Software. It is maintained and updated through the work of many users who volunteer their time and effort.
Top issues to fix
9 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.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Missing OpenGraph tags
SEOAdd og:title/og:description/og:image so shared links render a proper preview card.
+3 more issues — details in the sections below.
SEO
7 issue(s) found
Performance
170 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
+5 overall since Jul 15, 2026
- Overall
- 86
- SEO
- 60
- Security
- 90
- Performance
- 100
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
Debian is an operating system and a distribution of Free Software. It is maintained and updated through the work of many users who volunteer their time and effort.
Contact
Email, phone, and address published on this site's own pages.
- webmaster@debian.org
Meta tags
- Title
- Debian -- The Universal Operating System
- Description
- Debian is an operating system and a distribution of Free Software. It is maintained and updated through the work of many users who volunteer their time and effort.
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- 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
- Let's Encrypt
- Subject
- www.debian.org
- Valid from
- Jun 3, 2026
- Valid to
- Sep 1, 2026
- Days until expiry
- 33
- SAN domains
- www.debian.org
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyEnabled
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 4 · H2 11 · H3 6
Links
21 internal · 7 external · 20 broken
Images
16 total · 0 missing alt
Scripts / Styles
0 scripts · 4 stylesheets
JS / CSS size
0 B · 0 B
Page size
15.4 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Meta description longer than 160 characters
- Missing canonical link
- Multiple H1 headings found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://debian.org
- Final URL
- https://www.debian.org/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 170 ms
- HTML size
- 15.4 KB
- Redirect chain
- https://debian.org → https://www.debian.org/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does debian.org use?
- debian.org is built with Apache.
- Is debian.org secure (HTTPS)?
- Yes. debian.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 1, 2026.
- Who hosts debian.org?
- Hosting provider information for debian.org is not available yet.
- What is debian.org's SEO score?
- debian.org scored 60/100 for SEO in the latest analysis (fair).
- What is debian.org's overall website score?
- debian.org has an overall SiteGraph score of 86/100, combining SEO, performance, security, and accessibility.
- Has debian.org's score changed over time?
- debian.org's overall score has improved by 5 points (from 81 to 86) since Jul 15, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card