chartjs.org
Chart.js | Open source HTML5 Charts for your website
Last scanned Aug 3, 2026, 1:00 AM · 6 views
Overall score
Great
Summary
Simple yet flexible JavaScript charting library for the modern web. This website uses Google Analytics behind Cloudflare CDN. SEO is good (75/100) and accessibility is excellent (95/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing canonical link.
Simple yet flexible JavaScript charting library for the modern web
Top issues to fix
10 issues found · 3 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 viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
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.
+4 more issues — details in the sections below.
SEO
4 issue(s) found
Performance
20 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Score history
-1 overall since Jul 26, 2026
- Overall
- 83
- SEO
- 75
- Security
- 65
- Performance
- 100
- Accessibility
- 95
Organization
Company details published in this site's own structured data.
Simple yet flexible JavaScript charting library for the modern web
Meta tags
- Title
- Chart.js | Open source HTML5 Charts for your website
- Description
- Simple yet flexible JavaScript charting library for the modern web
- Canonical
- Language
- en-US
- Charset
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- Cloudflare
- 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
- Google Trust Services
- Subject
- chartjs.org
- Valid from
- Jun 16, 2026
- Valid to
- Sep 14, 2026
- Days until expiry
- 42
- SAN domains
- chartjs.org, *.chartjs.org
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 1 · H2 2 · H3 10
Links
7 internal · 3 external · 10 broken
Images
7 total · 0 missing alt
Scripts / Styles
6 scripts · 1 stylesheets
JS / CSS size
7.2 KB · 0 B
Page size
17.3 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing canonical link
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- Missing viewport meta tag
Scan details
- Requested URL
- https://chartjs.org
- Final URL
- https://www.chartjs.org/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 20 ms
- HTML size
- 17.3 KB
- Redirect chain
- https://chartjs.org → https://www.chartjs.org/
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Frequently asked questions
- What technology does chartjs.org use?
- chartjs.org is built with Google Analytics, Cloudflare Analytics.
- Is chartjs.org secure (HTTPS)?
- Yes. chartjs.org uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Sep 14, 2026.
- Who hosts chartjs.org?
- Hosting provider information for chartjs.org is not available yet.
- What is chartjs.org's SEO score?
- chartjs.org scored 75/100 for SEO in the latest analysis (fair).
- What is chartjs.org's overall website score?
- chartjs.org has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.
- Has chartjs.org's score changed over time?
- chartjs.org's overall score has declined by 1 point (from 84 to 83) since Jul 26, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card