astral.sh
Astral: High-performance Python tooling
Last scanned Jul 26, 2026, 5:17 AM · 3 views
Overall score
Excellent
Summary
Astral builds high-performance developer tools for the Python ecosystem: Ruff, ty, and uv, an extremely fast Python package manager, written in Rust. This website uses Next.js hosted on Cloudflare behind Cloudflare CDN. SEO is excellent (95/100) and accessibility is excellent (90/100). Security scores good (75/100) and performance excellent (100/100). Top issue: robots.txt not found.
Astral builds high-performance developer tools for the Python ecosystem: Ruff, ty, and uv, an extremely fast Python package manager, written in Rust.
- United States
- Hosted on Cloudflare
Top issues to fix
5 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.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
Missing html lang attribute
AccessibilitySet <html lang="…"> so screen readers pick the right pronunciation rules.
SEO
1 issue(s) found
Performance
42 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Organization
Company details published in this site's own structured data.
Astral builds high-performance developer tools for the Python ecosystem: Ruff, ty, and uv, an extremely fast Python package manager, written in Rust.
Meta tags
- Title
- Astral: High-performance Python tooling
- Description
- Astral builds high-performance developer tools for the Python ecosystem: Ruff, ty, and uv, an extremely fast Python package manager, written in Rust.
- Canonical
- https://astral.sh/
- Language
- Charset
- utf-8
- Viewport
- initial-scale=1.0, width=device-width
- Robots meta
- index,follow
- Manifest
- https://astral.sh/static/site.webmanifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Cloudflare
- CDN provider
- Cloudflare
- IP address
- 104.26.13.77
- 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
- astral.sh
- Valid from
- Jul 24, 2026
- Valid to
- Oct 22, 2026
- Days until expiry
- 88
- SAN domains
- astral.sh, pytorch.astral.sh
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 5 · H3 4
Links
7 internal · 8 external · 0 broken
Images
49 total · 0 missing alt
Scripts / Styles
28 scripts · 2 stylesheets
JS / CSS size
6.9 KB · 14.5 KB
Page size
141 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Found
- URLs in sitemap
- 45
SEO issues
- robots.txt not found
Accessibility issues
- Missing <html lang> attribute
Scan details
- Requested URL
- https://astral.sh
- Final URL
- https://astral.sh
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 40 ms
- HTML size
- 141 KB
- Redirect chain
- https://astral.sh
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does astral.sh use?
- astral.sh is built with Next.js.
- Is astral.sh secure (HTTPS)?
- Yes. astral.sh uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 22, 2026.
- Who hosts astral.sh?
- astral.sh is hosted on Cloudflare, behind Cloudflare CDN.
- What is astral.sh's SEO score?
- astral.sh scored 95/100 for SEO in the latest analysis (excellent).
- What is astral.sh's overall website score?
- astral.sh has an overall SiteGraph score of 90/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card