sagemath.org
SageMath - Open-Source Mathematical Software System
Last scanned Jul 26, 2026, 5:47 AM
Overall score
Fair
Summary
This website uses jQuery hosted on Cloudflare behind Cloudflare CDN. SEO is fair (65/100) and accessibility is excellent (90/100). Security scores fair (65/100) and performance excellent (90/100). Top issue: Missing meta description.
- United States
- Hosted on Cloudflare
Top issues to fix
9 issues found · 4 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.
Missing meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
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.
+3 more issues — details in the sections below.
SEO
4 issue(s) found
Performance
1.00 s
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- SageMath - Open-Source Mathematical Software System
- Description
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1.0
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 172.67.75.32
- ASN
- AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Google Trust Services
- Subject
- sagemath.org
- Valid from
- Jul 12, 2026
- Valid to
- Oct 10, 2026
- Days until expiry
- 75
- SAN domains
- sagemath.org, *.sagemath.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 0 · H2 6 · H3 0
Links
29 internal · 52 external · 1 broken
Images
5 total · 0 missing alt
Scripts / Styles
3 scripts · 2 stylesheets
JS / CSS size
93.9 KB · 292 B
Page size
15.1 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 13
- sitemap.xml
- Found
- URLs in sitemap
- 8
SEO issues
- Missing meta description
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
Accessibility issues
- No H1 heading found
Scan details
- Requested URL
- https://sagemath.org
- Final URL
- https://www.sagemath.org/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 1.00 s
- HTML size
- 15.1 KB
- Redirect chain
- https://sagemath.org → http://www.sagemath.org/ → https://www.sagemath.org/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does sagemath.org use?
- sagemath.org is built with jQuery.
- Is sagemath.org secure (HTTPS)?
- Yes. sagemath.org uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 10, 2026.
- Who hosts sagemath.org?
- sagemath.org is hosted on Cloudflare, behind Cloudflare CDN.
- What is sagemath.org's SEO score?
- sagemath.org scored 65/100 for SEO in the latest analysis (fair).
- What is sagemath.org's overall website score?
- sagemath.org has an overall SiteGraph score of 76/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card