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babel/babel

🐠 Babel is a compiler for writing next generation JavaScript.
Source code at GitHub https://babel.dev
babel/babel.json
{
  "createdAt": "2014-09-28T13:38:23Z",
  "defaultBranch": "main",
  "description": "🐠 Babel is a compiler for writing next generation JavaScript.",
  "fullName": "babel/babel",
  "homepage": "https://babel.dev",
  "language": "TypeScript",
  "name": "babel",
  "pushedAt": "2025-11-26T10:42:24Z",
  "stargazersCount": 43813,
  "topics": [
    "ast",
    "babel",
    "compiler",
    "es2015",
    "es6",
    "flavortown",
    "javascript"
  ],
  "updatedAt": "2025-11-27T04:17:01Z",
  "url": "https://github.com/babel/babel"
}

babel

The compiler for writing next generation JavaScript.

Gitpod ready-to-code pkg.pr.new

v7 npm Downloads v6 npm Downloads

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Supporting Babel

Backers on Open Collective Sponsors on Open Collective Business Strategy Status

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:

  • Giving developer time on the project. (Message us on Twitter or Slack for guidance!)
  • Giving funds by becoming a sponsor on Open Collective or GitHub (which goes to our Open Collective account)!

Sponsors

Section titled “Sponsors”

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

Intro

Section titled “Intro”

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.

In

// ES2020 nullish coalescing
function greet(input) {
  return input ?? "Hello world";
}

Out

function greet(input) {
  return input != null ? input : "Hello world";
}

Try it out at our REPL.

FAQ

Section titled “FAQ”

Who maintains Babel?

Section titled “Who maintains Babel?”

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

Is there a Babel song?

Section titled “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?

Section titled “Looking for support?”

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

Where are the docs?

Section titled “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?

Section titled “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?

Section titled “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?

Section titled “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).

License

Section titled “License”

[MIT]!(LICENSE)