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markdownguide.org

Markdown Guide

Last scanned Jul 26, 2026, 5:17 AM · 1 view

77

Overall score

Fair

Summary

A free and open-source reference guide that explains how to use Markdown. This website uses Nginx hosted on Fastly behind Fastly CDN. SEO is good (80/100) and accessibility is excellent (90/100). Security scores good (75/100) and performance fair (65/100). Top issue: No H1 heading found.

A free and open-source reference guide that explains how to use Markdown.

United States
Hosted on Fastly

Top issues to fix

6 issues found · 4 high priority

  • TLS certificate expires in 12 days

    Security

    Renew now (or enable auto-renewal) — an expired certificate blocks visitors with a full-page browser warning.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • 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.

  • Slow estimated load (10.1s)

    Performance

    Use a CDN, enable caching/compression, and cut render-blocking assets — every extra second costs conversions.

  • No structured data (JSON-LD) found

    SEO

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

  • 2 broken links on the page

    SEO

    Fix or remove broken links — they waste crawl budget and erode user trust.

80

SEO

2 issue(s) found

65

Performance

10.12 s

75

Security

HTTPS & header checks

90

Accessibility

1 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.

A free and open-source reference guide that explains how to use Markdown.

Contact

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

Source: https://www.markdownguide.org/contact/

Meta tags

Title
Markdown Guide
Description
A free and open-source reference guide that explains how to use Markdown.
Canonical
https://www.markdownguide.org/
Language
en
Charset
utf-8
Viewport
width=device-width, initial-scale=1
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
Markdown Guide
og:description
A free and open-source reference guide that explains how to use Markdown.
og:type
website
og:url
https://www.markdownguide.org/

Twitter Card

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

Technologies

Detected frameworks, languages, and tools.

jQueryNginx

Hosting & CDN

Hosting provider
Fastly
CDN provider
Fastly
IP address
151.101.67.52
ASN
AS54113 (FASTLY - Fastly, Inc., US)

DNS records

TypeValue
A
  • 151.101.67.52
  • 151.101.3.52
  • 151.101.195.52
  • 151.101.131.52
AAAA
  • 2a04:4e42:200::820
  • 2a04:4e42::820
  • 2a04:4e42:400::820
  • 2a04:4e42:600::820
MX—
TXT—
NS—
CAA—
CNAME
  • dualstack.t.sni.global.fastly.net
IPv6 supportYes

TLS / SSL certificate

Version
TLS 1.3
Issuer
Certainly
Subject
www.markdownguide.org
Valid from
Jul 8, 2026
Valid to
Aug 7, 2026
Days until expiry
12
SAN domains
markdownguide.org, www.markdownguide.org

Security headers

  • Strict-Transport-SecurityEnabled
  • Content-Security-PolicyMissing
  • X-Frame-OptionsEnabled
  • X-Content-Type-OptionsEnabled
  • Referrer-PolicyEnabled
  • Permissions-PolicyEnabled

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 1 · H3 0

Links

13 internal · 5 external · 2 broken

Images

3 total · 0 missing alt

Scripts / Styles

10 scripts · 1 stylesheets

JS / CSS size

1.2 MB · 189 KB

Page size

7.7 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
2
sitemap.xml
Found
URLs in sitemap
84

SEO issues

  • No H1 heading found
  • No structured data (JSON-LD) found

Accessibility issues

  • No H1 heading found

Scan details

Requested URL
https://markdownguide.org
Final URL
https://www.markdownguide.org/
HTTP status
200
HTTP version
HTTP/2
Response time
10.12 s
HTML size
7.7 KB
Redirect chain
https://markdownguide.org → https://www.markdownguide.org/

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Frequently asked questions

What technology does markdownguide.org use?
markdownguide.org is built with jQuery, Nginx.
Is markdownguide.org secure (HTTPS)?
Yes. markdownguide.org uses TLS 1.3 with a certificate issued by Certainly, valid until Aug 7, 2026.
Who hosts markdownguide.org?
markdownguide.org is hosted on Fastly, behind Fastly CDN.
What is markdownguide.org's SEO score?
markdownguide.org scored 80/100 for SEO in the latest analysis (great).
What is markdownguide.org's overall website score?
markdownguide.org has an overall SiteGraph score of 77/100, combining SEO, performance, security, and accessibility.