qubes-os.org
Qubes OS: A reasonably secure operating system | Qubes OS
Last scanned Jul 26, 2026, 12:19 PM
Overall score
Great
Summary
Qubes is a security-oriented, free and open-source operating system for personal computers that allows you to securely compartmentalize your digital life. This website uses jQuery behind Fastly CDN. SEO is excellent (90/100) and accessibility is fair (70/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: robots.txt not found.
Qubes is a security-oriented, free and open-source operating system for personal computers that allows you to securely compartmentalize your digital life.
Top issues to fix
8 issues found · 3 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
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.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
+2 more issues — details in the sections below.
SEO
2 issue(s) found
Performance
108 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
Qubes is a security-oriented, free and open-source operating system for personal computers that allows you to securely compartmentalize your digital life.
Meta tags
- Title
- Qubes OS: A reasonably secure operating system | Qubes OS
- Description
- Qubes is a security-oriented, free and open-source operating system for personal computers that allows you to securely compartmentalize your digital life.
- Canonical
- https://www.qubes-os.org/
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
- https://www.qubes-os.org/manifest.json?v=bOv986l09r
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- Fastly
- 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.qubes-os.org
- Valid from
- Jul 20, 2026
- Valid to
- Oct 18, 2026
- Days until expiry
- 81
- SAN domains
- www.qubes-os.org
Security headers
- Strict-Transport-SecurityMissing
- 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 5 · H3 5
Links
50 internal · 31 external · 20 broken
Images
16 total · 14 missing alt
Scripts / Styles
5 scripts · 3 stylesheets
JS / CSS size
71 B · 0 B
Page size
30.5 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- Over half of images are missing alt text
Scan details
- Requested URL
- https://qubes-os.org
- Final URL
- https://www.qubes-os.org/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 108 ms
- HTML size
- 30.5 KB
- Redirect chain
- https://qubes-os.org → https://www.qubes-os.org/
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Frequently asked questions
- What technology does qubes-os.org use?
- qubes-os.org is built with jQuery.
- Is qubes-os.org secure (HTTPS)?
- Yes. qubes-os.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 18, 2026.
- Who hosts qubes-os.org?
- Hosting provider information for qubes-os.org is not available yet.
- What is qubes-os.org's SEO score?
- qubes-os.org scored 90/100 for SEO in the latest analysis (excellent).
- What is qubes-os.org's overall website score?
- qubes-os.org has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card