Typescriptlang.org - SEO Checker

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Overview of the SEO Check
Meta information
80% 
Page quality
92% 
Page structure
93% 
Link structure
25% 
Server
93% 
External factors
100% 
SEO Score
Response time
0.53 s
File size
263.00 kB
Words
847
Media files
3
Number of links
67 internal / 23 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
TypeScript: JavaScript With Syntax For Types.
The length of the page title is perfect. (417 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
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.
The meta description is too long: 1147 pixels from max. 1000 pixels. Optimize description
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
viewportwidth=device-width, initial-scale=1, shrink-to-fit=no
generatorGatsby 5.13.5
theme-color#3178C6
descriptionTypeScript 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.
langen
twitter:sitetypescriptlang
og:titleJavaScript With Syntax For Types.
og:descriptionTypeScript 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.
x-ua-compatibleie=edge
charsetutf-8

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Page quality

Content
(Critically important)
There are 2 text duplicates on this page:
  • Duplicate: Property 'name' does not exist on type '{ firstName: string; lastName:...
This page contains 847 words. That's ok.
24% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
Words from the H1 heading are used in the page content.
The page contains a listing, which indicates a good text layout.
11 paragraphs were found on this page.
The text content is perfect.
No placeholders texts or images were found.
The average number of words per sentence of 22.3 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width, initial-scale=1, shrink-to-fit=no" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 17 tags for this page.
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
/images/index/stack-overflow.svgImage of the stack overflow logo, and a graph showing TypeScript as the 2nd most popular language
/images/index/state-of-js.svgLogo of the State of JS survey
data:[...] Base64Microsoft Logo

Page structure

H1 heading
(Critically important)
TypeScript is JavaScript with syntax for types.
The H1 heading is perfect.
Headings
(Important)
Some headings occur twice on the page.
There are 26 headings on the page. The amount of headings should be in a more proper relation to the amount of text.

Heading structure

Heading levelContent
H1 TypeScript is JavaScript with syntax for types.
H2 What is TypeScript?
H2 Get Started
H2 Adopt TypeScript Gradually
H2 TypeScript becomes JavaScript via the delete key.
H2 TypeScript Testimonials
H2 Loved by Developers
H2 Get Started Duplicate text
H3 JavaScript and More
H3 A Result You Can Trust
H3 Safety at Scale
H3 Describe Your Data
H3 Open Source with TypeScript
H3 Using TypeScript
H3 Community
H4 JavaScript Essentials
H4 Functions with JavaScript
H4 Working With Classes
H4 Modern JavaScript
H4 External APIs
H4 Helping with JavaScript
H4 Primitives
H4 Type Primitives
H4 Meta-Types
H4 Language
H4 Language Extensions
Some internal links have dynamic parameters. All internal URLs, which are not marked as nofollow, should not contain dynamic parameters.
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
There are 23 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://www.typescriptlang.org/Anchor Skip to main content
https://www.typescriptlang.org/TypeScript
/download/Download
/docs/Docs
/docs/handbook/intro.htmlHandbook
/community/Community
/playPlayground
/tools/Tools
/downloadTry TypeScript Now Online or via npm
/docs/handbook/release-notes/t...TypeScript 5.5
https://devblogs.microsoft.com...External Subdomain 5.6
/docs/handbook/intro.htmlHandbook Learn the language
/playPlayground Try in your browser
/download/Download Install TypeScript
https://slack.engineering/type...New window External Read
https://www.typescriptlang.org/Anchor No Text
https://www.typescriptlang.org/Anchor No Text
https://angular.io/New window External Angular
https://vuejs.org/New window External Vue
https://jestjs.io/New window External Jest
https://redux.js.org/New window External Subdomain Redux
https://ionicframework.com/New window External Ionic
https://probot.github.io/New window External Subdomain Probot
https://deno.land/New window External Deno
https://github.com/vercel/vercelNew window External Vercel
https://yarnpkg.com/New window External Yarn
https://github.com/desktop/des...New window External GitHub Desktop
https://insights.stackoverflow...New window External Subdomain Anchor Stack Overflow 2020 Developer survey
https://2020.stateofjs.com/en-...New window External Subdomain 2020 State of JS
/docs/handbook/intro.htmlText duplicate Handbook Learn the language
/playText duplicate Playground Try in your browser
/download/Text duplicate Download Install TypeScript
https://go.microsoft.com/fwlin...External Subdomain Privacy
A-TITLE Microsoft Privacy Policy
https://go.microsoft.com/fwlin...External Subdomain Terms of Use
/docs/Get Started
/download/Text duplicate Download
/community/Text duplicate Community
/play/Text duplicate Playground
/tsconfig/TSConfig Ref
/why-create-typescript/Why TypeScript
/branding/Design
/play/Code Samples
/play/?target=1&q=269Hello World
A-TITLE Open the example: Hello World
/play/?strict=false&q=377Objects and Arrays
A-TITLE Open the example: Objects and Arrays
/play/?noImplicitAny=false&q=402Functions
A-TITLE Open the example: Functions
/play/?strictNullChecks=true&q...Code Flow
A-TITLE Open the example: Code Flow
/play/?q=90Generic Functions
A-TITLE Open the example: Generic Functions
/play/?q=205Typing Functions
A-TITLE Open the example: Typing Functions
/play/?esModuleInterop=true&q=214Function Chaining
A-TITLE Open the example: Function Chaining
/play/?q=465Classes 101
A-TITLE Open the example: Classes 101
/play/?q=19This
A-TITLE Open the example: This
/play/?q=200Generic Classes
A-TITLE Open the example: Generic Classes
/play/?q=45Mixins
A-TITLE Open the example: Mixins
/play/?q=423Async Await
A-TITLE Open the example: Async Await
/play/?q=248Immutability
A-TITLE Open the example: Immutability
/play/?q=292Import Export
A-TITLE Open the example: Import Export
/play/?useJavaScript=trueq=511JSDoc Support
A-TITLE Open the example: JSDoc Support
/play/?useJavaScript=trueq=241TypeScript with Web
A-TITLE Open the example: TypeScript with Web
/play/?jsx=2&esModuleInterop=t...TypeScript with React
A-TITLE Open the example: TypeScript with React
/play/?q=81TypeScript with Deno
A-TITLE Open the example: TypeScript with Deno
/play/?useJavaScript=trueq=310TypeScript with Node
A-TITLE Open the example: TypeScript with Node
/play/?useJavaScript=trueq=82TypeScript with WebGL
A-TITLE Open the example: TypeScript with WebGL
/play/?q=57Quick Fixes
A-TITLE Open the example: Quick Fixes
/play/?q=59Errors
A-TITLE Open the example: Errors
/play/?q=9Any
A-TITLE Open the example: Any
/play/?q=394Literals
A-TITLE Open the example: Literals
/play/?q=40Union and Intersection Types
A-TITLE Open the example: Union and Intersection Types
/play/?q=497Unknown and Never
A-TITLE Open the example: Unknown and Never
/play/?q=182Tuples
A-TITLE Open the example: Tuples
/play/?strictNullChecks=true&q...Built-in Utility Types
A-TITLE Open the example: Built-in Utility Types
/play/?strictNullChecks=false&...Nullable Types
A-TITLE Open the example: Nullable Types
/play/?q=434Conditional Types
A-TITLE Open the example: Conditional Types
/play/?q=344Discriminate Types
A-TITLE Open the example: Discriminate Types
/play/?q=77Indexed Types
A-TITLE Open the example: Indexed Types
/play/?q=332Mapped Types
A-TITLE Open the example: Mapped Types
/play/?strictFunctionTypes=fal...Soundness
A-TITLE Open the example: Soundness
/play/?q=248Structural Typing
A-TITLE Open the example: Structural Typing
/play/?q=199Type Guards
A-TITLE Open the example: Type Guards
/play/?q=113Type Widening and Narrowing
A-TITLE Open the example: Type Widening and Narrowing
/play/?q=400Enums
A-TITLE Open the example: Enums
/play/?q=510Nominal Typing
A-TITLE Open the example: Nominal Typing
/play/?q=85Types vs Interfaces
A-TITLE Open the example: Types vs Interfaces
/communityGet Help
https://devblogs.microsoft.com...External Subdomain Blog
https://github.com/microsoft/T...External Anchor GitHub Repo
https://discord.gg/typescriptExternal Community Chat
https://twitter.com/TypeScriptExternal @TypeScript
https://fosstodon.org/@TypeScriptExternal Mastodon
https://stackoverflow.com/ques...External Stack Overflow
https://github.com/microsoft/T...External Web Repo

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.typescriptlang.org/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time of 0.53 seconds is longer than the recommended limit of 0.4 seconds. A high response time unnecessarily slows down search engine crawling and results in bad user experience as well.
The file size of the HTML document is fine (263 kB).

HTTP Response Header

NameValue
serverGitHub.com
content-typetext/html; charset=utf-8
x-origin-cacheHIT
last-modifiedThu, 15 Aug 2024 17:58:48 GMT
access-control-allow-origin*
etagW/"66be41d8-41c23"
expiresThu, 15 Aug 2024 18:12:19 GMT
cache-controlmax-age=600
content-encodinggzip
x-proxy-cacheHIT
x-github-request-id6A28:12CDC0:613229:639427:66BE4386
accept-rangesbytes
dateSun, 18 Aug 2024 10:17:01 GMT
via1.1 varnish
age378
x-served-bycache-fra-eddf8230106-FRA
x-cacheHIT
x-cache-hits1
x-timerS1723976221.219157,VS0,VE4
varyAccept-Encoding
x-fastly-request-ide97b289e6d7febb5ac05c8117b085a2f06c6d28a
content-length73156
statuscode200
http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 20,666 referring domains.
This page has 587,122 backlinks.
This page has backlinks from 10,701 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

No valid Robots.txt file was found.

Similar sites

Search preview

www.typescriptlang.org
TypeScript: JavaScript With Syntax For Types.
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.

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
TypeScript95%Check
TypeScript JavaScript89%Check
JavaScript82%Check
TypeScript extends JavaScript77%Check
syntax66%Check
TypeScript adds66%Check
language61%Check
Catch51%Check
Programming Language51%Check
code46%Check
Show more keywords and terms

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