llvm.org
The LLVM Compiler Infrastructure Project
Last scanned Jul 25, 2026, 10:25 AM · 2 views
Overall score
Fair
Summary
This website uses Apache hosted on AWS. SEO is fair (55/100) and accessibility is poor (45/100). Security scores fair (65/100) and performance excellent (90/100). Top issue: Missing meta description.
- United States
- Hosted on AWS
Top issues to fix
13 issues found · 6 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.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
Missing viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
+7 more issues — details in the sections below.
SEO
6 issue(s) found
Performance
1.18 s
Security
HTTPS & header checks
Accessibility
4 issue(s) found
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- The LLVM Compiler Infrastructure Project
- Description
- Canonical
- Language
- Charset
- utf-8
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- AWS
- CDN provider
- —
- IP address
- 54.67.122.174
- ASN
- AS16509 (AMAZON-02 - Amazon.com, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX |
|
| TXT |
|
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.2
- Issuer
- Let's Encrypt
- Subject
- llvm.org
- Valid from
- Jul 2, 2026
- Valid to
- Sep 30, 2026
- Days until expiry
- 66
- SAN domains
- bugs.llvm.org, clang-analyzer.llvm.org, clang.llvm.org, compiler-rt.llvm.org, dragonegg.llvm.org, flang.llvm.org, git.llvm.org, klee.llvm.org, libc.llvm.org, libclc.llvm.org, libcxx.llvm.org, libcxxabi.llvm.org, lists.llvm.org, lld.llvm.org, lldb.llvm.org, llvm.org, openmp.llvm.org, polly.llvm.org, vmkit.llvm.org, www.llvm.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 0 · H3 0
Links
60 internal · 64 external · 0 broken
Images
1 total · 1 missing alt
Scripts / Styles
0 scripts · 1 stylesheets
JS / CSS size
0 B · 4.4 KB
Page size
17.9 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 14
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing meta description
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
- Over half of images are missing alt text
- No H1 heading found
- Missing <html lang> attribute
- Missing viewport meta tag
Scan details
- Requested URL
- https://llvm.org
- Final URL
- https://llvm.org
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 1.18 s
- HTML size
- 17.9 KB
- Redirect chain
- https://llvm.org
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does llvm.org use?
- llvm.org is built with Apache.
- Is llvm.org secure (HTTPS)?
- Yes. llvm.org uses TLS 1.2 with a certificate issued by Let's Encrypt, valid until Sep 30, 2026.
- Who hosts llvm.org?
- llvm.org is hosted on AWS.
- What is llvm.org's SEO score?
- llvm.org scored 55/100 for SEO in the latest analysis (fair).
- What is llvm.org's overall website score?
- llvm.org has an overall SiteGraph score of 64/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card