Content & assets
Headings
H1 0 · H2 4 · H3 2
Links
72 internal · 28 external · 2 broken
Images
12 total · 0 missing alt
Scripts / Styles
0 scripts · 3 stylesheets
JS / CSS size
0 B · 26.9 KB
Page size
31.6 KB
gnu.org
The GNU Operating System and the Free Software Movement
Last scanned Jul 14, 2026, 1:28 PM
85
Overall score
Great
Summary
This website uses Apache hosted on FREEASINFREEDOM - Free Software Foundation, Inc., US. SEO is fair (65/100) and accessibility is excellent (90/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: Missing canonical link.
65
SEO
5 issue(s) found
100
Performance
401 ms
90
Security
HTTPS & header checks
90
Accessibility
1 issue(s) found
Meta tags
- Title
- The GNU Operating System and the Free Software Movement
- Description
- Since 1983, developing the free Unix style operating system GNU, so that computer users can have the freedom to share and improve the software they use.
- 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
- FREEASINFREEDOM - Free Software Foundation, Inc., US
- CDN provider
- —
- IP address
- 209.51.188.116
- ASN
- AS22989 (FREEASINFREEDOM - Free Software Foundation, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- wildebeest1p.gnu.org
- Valid from
- Jul 9, 2026
- Valid to
- Oct 7, 2026
- Days until expiry
- 84
- SAN domains
- classpath.org, digitalspeech.org, donate.digitalspeech.org, dotgnu.org, emacs.org, glibc.gnu.org, gnewsense.org, gnu.org, gnukids.org, gplfaq.org, hurd.gnu.org, ipv6.nongnu.org, playfreedom.org, playogg.com, playogg.org, upgradefromwindows.com, upgradefromwindows8.org, vcdimager.org, wildebeest.ipv6.gnu.org, wildebeest1p.gnu.org, www.classpath.org, www.digitalspeech.org, www.emacs.org, www.gnu.org, www.gnukids.org, www.hurd.gnu.org, www.ipv6.gnu.org, www.ipv6.nongnu.org, www.nongnu.org, www.playfreedom.org, www.playogg.com, www.upgradefromwindows.com, www.upgradefromwindows8.org, www6.gnu.org
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 64
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
- No H1 heading found
Team
People listed on this site's own team or about page.
Scan details
- Requested URL
- https://gnu.org
- Final URL
- https://www.gnu.org/
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 401 ms
- HTML size
- 31.6 KB
- Redirect chain
- https://gnu.org → https://www.gnu.org/
Frequently asked questions
- What technology does gnu.org use?
- gnu.org is built with Apache.
- Is gnu.org secure (HTTPS)?
- Yes. gnu.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 7, 2026.
- Who hosts gnu.org?
- gnu.org is hosted on FREEASINFREEDOM - Free Software Foundation, Inc., US.
- What is gnu.org's SEO score?
- gnu.org scored 65/100 for SEO in the latest analysis (fair).
- What is gnu.org's overall website score?
- gnu.org has an overall SiteGraph score of 85/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card