markdownguide.org
Markdown Guide
Last scanned Aug 2, 2026, 9:00 PM · 5 views
Overall score
Great
Summary
A free and open-source reference guide that explains how to use Markdown. This website uses Nginx behind Fastly CDN. SEO is fair (70/100) and accessibility is excellent (90/100). Security scores excellent (90/100) and performance excellent (100/100). Top issue: No H1 heading found.
A free and open-source reference guide that explains how to use Markdown.
Top issues to fix
7 issues found · 2 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
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.
TLS certificate expires in 24 days
SecurityRenew soon or enable auto-renewal to avoid a browser-warning outage.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
+1 more issue — details in the sections below.
SEO
4 issue(s) found
Performance
6 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Score history
+10 overall since Jul 26, 2026
- Overall
- 87
- SEO
- 70
- Security
- 90
- Performance
- 100
- Accessibility
- 90
Organization
Company details published in this site's own structured data.
A free and open-source reference guide that explains how to use Markdown.
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
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- Fastly
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Certainly
- Subject
- www.markdownguide.org
- Valid from
- Jul 28, 2026
- Valid to
- Aug 27, 2026
- Days until expiry
- 24
- 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 · 18 broken
Images
3 total · 0 missing alt
Scripts / Styles
10 scripts · 1 stylesheets
JS / CSS size
875 B · 0 B
Page size
7.7 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- No H1 heading found
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not 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
- 6 ms
- HTML size
- 7.7 KB
- Redirect chain
- https://markdownguide.org → https://www.markdownguide.org/
See something wrong on this report? Request a correction
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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 27, 2026.
- Who hosts markdownguide.org?
- Hosting provider information for markdownguide.org is not available yet.
- What is markdownguide.org's SEO score?
- markdownguide.org scored 70/100 for SEO in the latest analysis (fair).
- What is markdownguide.org's overall website score?
- markdownguide.org has an overall SiteGraph score of 87/100, combining SEO, performance, security, and accessibility.
- Has markdownguide.org's score changed over time?
- markdownguide.org's overall score has improved by 10 points (from 77 to 87) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card