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mkdocs.org

MkDocs

Last scanned Jul 26, 2026, 5:47 AM

75

Overall score

Fair

Summary

Project documentation with Markdown. This website uses Google Analytics hosted on Fastly behind Fastly CDN. SEO is good (80/100) and accessibility is excellent (100/100). Security scores poor (25/100) and performance excellent (100/100). Top issue: No structured data (JSON-LD) found.

Project documentation with Markdown.

United States
Hosted on Fastly

Top issues to fix

7 issues found · 2 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 X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Missing X-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

  • No structured data (JSON-LD) found

    SEO

    Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

  • Missing OpenGraph tags

    SEO

    Add og:title/og:description/og:image so shared links render a proper preview card.

+1 more issue — details in the sections below.

80

SEO

3 issue(s) found

100

Performance

799 ms

25

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

Project documentation with Markdown.

X (Twitter)

Meta tags

Title
MkDocs
Description
Project documentation with Markdown.
Canonical
https://www.mkdocs.org/
Language
en
Charset
utf-8
Viewport
width=device-width, initial-scale=1.0
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

BootstrapjQueryGoogle Analytics

Hosting & CDN

Hosting provider
Fastly
CDN provider
Fastly
IP address
185.199.109.153
ASN
AS54113 (FASTLY - Fastly, Inc., US)

DNS records

TypeValue
A
  • 185.199.109.153
  • 185.199.110.153
  • 185.199.108.153
  • 185.199.111.153
AAAA
  • 2606:50c0:8000::153
  • 2606:50c0:8001::153
  • 2606:50c0:8002::153
  • 2606:50c0:8003::153
MX—
TXT—
NS—
CAA
  • 0 issue "digicert.com"
  • 0 issue "sectigo.com"
  • 0 issuewild "letsencrypt.org"
  • 0 issuewild "sectigo.com"
  • 0 issuewild "digicert.com"
  • 0 issue "letsencrypt.org"
CNAME
  • mkdocs.github.io
IPv6 supportYes

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
www.mkdocs.org
Valid from
Jun 25, 2026
Valid to
Sep 23, 2026
Days until expiry
57
SAN domains
www.mkdocs.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 1 · H3 4

Links

25 internal · 4 external · 0 broken

Images

0 total · 0 missing alt

Scripts / Styles

11 scripts · 6 stylesheets

JS / CSS size

155 KB · 199 KB

Page size

14.4 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Found
URLs in sitemap
19

SEO issues

  • No structured data (JSON-LD) found
  • Missing OpenGraph tags
  • robots.txt not found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://mkdocs.org
Final URL
https://www.mkdocs.org/
HTTP status
200
HTTP version
HTTP/2
Response time
799 ms
HTML size
14.4 KB
Redirect chain
https://mkdocs.org → https://www.mkdocs.org/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does mkdocs.org use?
mkdocs.org is built with Bootstrap, jQuery, Google Analytics.
Is mkdocs.org secure (HTTPS)?
Yes. mkdocs.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 23, 2026.
Who hosts mkdocs.org?
mkdocs.org is hosted on Fastly, behind Fastly CDN.
What is mkdocs.org's SEO score?
mkdocs.org scored 80/100 for SEO in the latest analysis (great).
What is mkdocs.org's overall website score?
mkdocs.org has an overall SiteGraph score of 75/100, combining SEO, performance, security, and accessibility.