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.

Hosting provider information for llvm.org is not available yet.

What is llvm.org's SEO score?

llvm.org scored 50/100 for SEO in the latest analysis (fair).

What is llvm.org's overall website score?

llvm.org has an overall SiteGraph score of 65/100, combining SEO, performance, security, and accessibility.

Has llvm.org's score changed over time?

llvm.org's overall score has improved by 1 point (from 64 to 65) since Jul 25, 2026.

llvm.org

The LLVM Compiler Infrastructure Project

Last scanned Aug 1, 2026, 11:00 AM · 9 views

Overall score

Fair

Summary

This website uses Apache. SEO is fair (50/100) and accessibility is poor (45/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.

Top issues to fix

15 issues found · 6 high priority

Missing Strict-Transport-Security header
Security
Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing meta description
SEO
Add a ~150-character meta description to control your search-result snippet and lift click-through rate.
No H1 heading found
SEO
Add 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
Accessibility
Add alt attributes to images — screen readers depend on them, and they help image SEO.
Missing viewport meta tag
Accessibility
Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.

+9 more issues — details in the sections below.

SEO

7 issue(s) found

100

Performance

961 ms

Security

HTTPS & header checks

Accessibility

4 issue(s) found

Score history

+1 overall since Jul 25, 2026

Overall: 65
SEO: 50
Security: 65
Performance: 100
Accessibility: 45

Contact

Email, phone, and address published on this site's own pages.

Email: llvm-admin@lists.llvm.org

Technologies

Detected frameworks, languages, and tools.

Apache

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: —
ASN: —

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: 59
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 · 20 broken

Images

1 total · 1 missing alt

Scripts / Styles

0 scripts · 1 stylesheets

JS / CSS size

0 B · 0 B

Page size

17.9 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
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
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://llvm.org
Final URL: https://llvm.org
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 961 ms
HTML size: 17.9 KB
Redirect chain: https://llvm.org

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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?: Hosting provider information for llvm.org is not available yet.
What is llvm.org's SEO score?: llvm.org scored 50/100 for SEO in the latest analysis (fair).
What is llvm.org's overall website score?: llvm.org has an overall SiteGraph score of 65/100, combining SEO, performance, security, and accessibility.
Has llvm.org's score changed over time?: llvm.org's overall score has improved by 1 point (from 64 to 65) since Jul 25, 2026.