nixos.org
Nix & NixOS | Declarative builds and deployments
Last scanned Aug 2, 2026, 5:00 AM · 11 views
Overall score
Great
Summary
Nix is a tool that takes a unique approach to package management and system configuration. This website uses Astro behind Netlify 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.
Nix is a tool that takes a unique approach to package management and system configuration. Learn how to make reproducible, declarative and reliable systems.
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
66 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.
Nix is a tool that takes a unique approach to package management and system configuration. Learn how to make reproducible, declarative and reliable systems.
Meta tags
- Title
- Nix & NixOS | Declarative builds and deployments
- Description
- Nix is a tool that takes a unique approach to package management and system configuration. Learn how to make reproducible, declarative and reliable systems.
- Canonical
- https://nixos.org/
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width
- Robots meta
- index, follow
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- Netlify
- 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
- nixos.org
- Valid from
- Jul 4, 2026
- Valid to
- Oct 2, 2026
- Days until expiry
- 61
- SAN domains
- nixos.org, www.nixos.org
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 3 · H3 10
Links
18 internal · 18 external · 20 broken
Images
2 total · 0 missing alt
Scripts / Styles
4 scripts · 3 stylesheets
JS / CSS size
3.2 KB · 0 B
Page size
56.0 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://nixos.org
- Final URL
- https://nixos.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 65 ms
- HTML size
- 56.0 KB
- Redirect chain
- https://nixos.org
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does nixos.org use?
- nixos.org is built with Astro.
- Is nixos.org secure (HTTPS)?
- Yes. nixos.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 2, 2026.
- Who hosts nixos.org?
- Hosting provider information for nixos.org is not available yet.
- What is nixos.org's SEO score?
- nixos.org scored 80/100 for SEO in the latest analysis (great).
- What is nixos.org's overall website score?
- nixos.org has an overall SiteGraph score of 88/100, combining SEO, performance, security, and accessibility.
- Has nixos.org's score changed over time?
- nixos.org's overall score has declined by 3 points (from 91 to 88) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card