mermaid.ai
Mermaid
Last scanned Aug 5, 2026, 9:00 PM · 8 views
Overall score
Great
Summary
Create diagrams, flowcharts, and documentation with Mermaid. This website uses Google Analytics hosted on AWS behind CloudFront CDN. SEO is good (80/100) and accessibility is excellent (100/100). Security scores fair (70/100) and performance excellent (90/100). Top issue: Missing canonical link.
Create diagrams, flowcharts, and documentation with Mermaid
- United States
- Hosted on AWS
Top issues to fix
6 issues found · 2 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 X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Missing OpenGraph tags
SEOAdd og:title/og:description/og:image so shared links render a proper preview card.
SEO
3 issue(s) found
Performance
1.06 s
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
+3 overall since Jul 26, 2026
- Overall
- 84
- SEO
- 80
- Security
- 70
- Performance
- 90
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
Create diagrams, flowcharts, and documentation with Mermaid
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- Mermaid
- Description
- Create diagrams, flowcharts, and documentation with Mermaid
- Canonical
- 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
- AWS
- CDN provider
- CloudFront
- IP address
- 13.227.249.121
- 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 1.3
- Issuer
- Amazon
- Subject
- *.mermaid.ai
- Valid from
- Oct 25, 2025
- Valid to
- Nov 23, 2026
- Days until expiry
- 110
- SAN domains
- *.mermaid.ai, mermaid.ai
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsEnabled
- Referrer-PolicyEnabled
- Permissions-PolicyEnabled
Compression: gzip · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 23 · H3 40
Links
25 internal · 7 external · 0 broken
Images
10 total · 0 missing alt
Scripts / Styles
5 scripts · 2 stylesheets
JS / CSS size
54.0 KB · 112 KB
Page size
299 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 1
- sitemap.xml
- Found
- URLs in sitemap
- -1
SEO issues
- Missing canonical link
- No structured data (JSON-LD) found
- Missing OpenGraph tags
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://mermaid.ai
- Final URL
- https://mermaid.ai
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 1.05 s
- HTML size
- 299 KB
- Redirect chain
- https://mermaid.ai
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Frequently asked questions
- What technology does mermaid.ai use?
- mermaid.ai is built with Svelte, Google Analytics, Google Ads.
- Is mermaid.ai secure (HTTPS)?
- Yes. mermaid.ai uses TLS 1.3 with a certificate issued by Amazon, valid until Nov 23, 2026.
- Who hosts mermaid.ai?
- mermaid.ai is hosted on AWS, behind CloudFront CDN.
- What is mermaid.ai's SEO score?
- mermaid.ai scored 80/100 for SEO in the latest analysis (great).
- What is mermaid.ai's overall website score?
- mermaid.ai has an overall SiteGraph score of 84/100, combining SEO, performance, security, and accessibility.
- Has mermaid.ai's score changed over time?
- mermaid.ai's overall score has improved by 3 points (from 81 to 84) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card