Welcome to Ext JS Thank you for downloading Ext JS. With a community of over one million developers and our robust family of Extware products, Ext JS is the leader in Javascript application development.


Use the included files to view samples and our API documentation.

For advanced, hands-on support, please see our premium support subscriptions. Larger organizations can use our enterprise training and services.


Our community forums have over 100,000 registered users and are a great place to ask questions and interact with other Ext JS developers.

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Ext JS is dual licensed. This means:

  • Free to use and test in your local development environment.
  • Free to use in your open source projects.
  • Purchase a developer license if you don’t plan on releasing your website or application’s code as open source.

To purchase a commercial license, please see our pricing page.

Looking for a job? Check out our Ext Job Board, where companies worldwide seek Ext developers.