Code Quality Rank: L4
Monthly Downloads: 0
Programming language: JavaScript
License: MIT License
Tags: ES6    
Latest version: v11.0.0-beta.1

Babel (Formerly 6to5) alternatives and similar libraries

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The compiler for writing next generation JavaScript.

Supporting Babel

Babel (pronounced "babble") is a community-driven project used by many companies and projects, and is maintained by a group of volunteers. If you'd like to help support the future of the project, please consider:


Our top sponsors are shown below! [Become a sponsor]


Babel is a tool that helps you write code in the latest version of JavaScript. When your supported environments don't support certain features natively, Babel will help you compile those features down to a supported version.


// ES2015 arrow function
[1, 2, 3].map((n) => n + 1);


[1, 2, 3].map(function(n) {
  return n + 1;

Try it out at our REPL.


Who maintains Babel?

Mostly a handful of volunteers, funded by you! Please check out our team page!

Is there a Babel song?

I'm so glad you asked: [Hallelujah —— In Praise of Babel](SONG.md) by @angus-c, audio version by @swyx. Tweet us your recordings!

Looking for support?

For questions and support please join our Slack Community (you can sign-up here for an invite), ask a question on Stack Overflow, or ping us on Twitter.

Where are the docs?

Check out our website: babeljs.io, and report issues/features at babel/website.

Want to report a bug or request a feature?

Please read through our [CONTRIBUTING.md](CONTRIBUTING.md) and fill out the issue template at babel/issues!

Want to contribute to Babel?

Check out:

Some resources:

  • Our [CONTRIBUTING.md](CONTRIBUTING.md) to get started with setting up the repo.
  • Our discussions/notes/roadmap: babel/notes
  • Our progress on TC39 proposals: babel/proposals
  • Our blog which contains release posts and explanations: /blog
  • Our videos page with talks about open source and Babel: /videos
  • Our podcast

How is the repo structured?

The Babel repo is managed as a [monorepo](doc/design/monorepo.md) that is composed of many [npm packages](packages/README.md).



*Note that all licence references and agreements mentioned in the Babel (Formerly 6to5) README section above are relevant to that project's source code only.