typescriptlang.org
TypeScript: JavaScript With Syntax For Types.
Last scanned Jul 25, 2026, 8:25 AM · 3 views
Overall score
Great
Summary
TypeScript extends JavaScript by adding types to the language. This website uses Gatsby hosted on Fastly behind Fastly CDN. SEO is fair (70/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.
TypeScript extends JavaScript by adding types to the language. TypeScript speeds up your development experience by catching errors and providing fixes before you even run your code.
- United States
- Hosted on Fastly
Top issues to fix
8 issues found · 1 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
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.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
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.
+2 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
233 ms
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
TypeScript extends JavaScript by adding types to the language. TypeScript speeds up your development experience by catching errors and providing fixes before you even run your code.
Meta tags
- Title
- TypeScript: JavaScript With Syntax For Types.
- Description
- TypeScript extends JavaScript by adding types to the language. TypeScript speeds up your development experience by catching errors and providing fixes before you even run your code.
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1, shrink-to-fit=no
- Robots meta
- Manifest
- https://www.typescriptlang.org/manifest.webmanifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA |
|
| MX | — |
| TXT | — |
| NS | — |
| CAA |
|
| CNAME |
|
| IPv6 support | Yes |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- www.typescriptlang.org
- Valid from
- Jul 1, 2026
- Valid to
- Sep 29, 2026
- Days until expiry
- 66
- SAN domains
- www.typescriptlang.org
Security headers
- Strict-Transport-SecurityEnabled
- 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 7 · H3 7
Links
14 internal · 23 external · 0 broken
Images
3 total · 0 missing alt
Scripts / Styles
7 scripts · 0 stylesheets
JS / CSS size
236 KB · 124 KB
Page size
253 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Meta description longer than 160 characters
- Missing canonical link
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://typescriptlang.org
- Final URL
- https://www.typescriptlang.org/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 228 ms
- HTML size
- 253 KB
- Redirect chain
- https://typescriptlang.org → https://www.typescriptlang.org/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does typescriptlang.org use?
- typescriptlang.org is built with Gatsby.
- Is typescriptlang.org secure (HTTPS)?
- Yes. typescriptlang.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 29, 2026.
- Who hosts typescriptlang.org?
- typescriptlang.org is hosted on Fastly, behind Fastly CDN.
- What is typescriptlang.org's SEO score?
- typescriptlang.org scored 70/100 for SEO in the latest analysis (fair).
- What is typescriptlang.org's overall website score?
- typescriptlang.org has an overall SiteGraph score of 85/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card