TypeScript lets you write JavaScript the way you really want to.
TypeScript is a typed superset of JavaScript that compiles to plain JavaScript.
Any browser. Any host. Any OS. Open Source.

Get TypeScript Now  


The command-line TypeScript compiler can be installed as a Node.js package.

npm install -g typescript
tsc helloworld.ts


Visual Studio includes TypeScript in the box, starting with Visual Studio 2013 Update 2. You can also edit TypeScript in WebStorm, Eclipse, and other editors. You can also try the latest versions:

TypeScript 1.4 for VS2013

VS2015 CTP5 (incl. TS 1.4)

Open Source

TypeScript is being developed on GitHub. The TypeScript compiler is implemented in TypeScript, and can be used in any JavaScript host.

Get the source code


Read the specification in doc or pdf

Play with the bits and file bugs.

Join the #typescript Twitter discussion and follow the GitHub project.


Tutorial - Best way to get up to speed on TypeScript.

Stack Overflow - Great place to get help with using TypeScript.

Blog - Keep up to date on the latest news.

DefinitelyTyped - Repository of library typings.

Friends of TypeScript