Babel

Summary

Babel is a free JavaScript compiler that turns modern syntax into code suited to current and older browsers or other environments. Its transformation tools include syntax conversion, codemods, and the option to add features through third-party polyfills such as core-js. Babel supplies transformers for the latest JavaScript and a React preset for JSX. It can remove Flow and TypeScript annotations, but it does not check types. Users can assemble transformation pipelines from plugins, combine them into presets, or write their own plugins. Source maps help debug compiled code. The command-line interface compiles files or directories, can watch for changes, and can generate source maps; installation documentation covers npm, Yarn, pnpm, and Bun. A standalone build also runs in browsers and other non-Node.js environments, including with scripts marked text/babel or text/jsx. For production, the documentation recommends transpiling ahead of time with a Node.js build system rather than using that standalone build. Babel is MIT-licensed, community-funded, and maintained by volunteers.

Who it is for

Babel suits JavaScript developers who need to transform modern syntax for different browsers or environments, or convert JSX. It may also suit teams that want configurable plugin pipelines and source maps.

Compared on code transpilers

Free plan

Yesbabel.dev

Syntax-version conversion

Yesbabel.dev

Intermediate output

Yesbabel.dev

CLI access

Yesbabel.dev

API access

Yesbabel.dev

Conversion mode

bothbabel.dev

Facts

What it does

Babel compiles modern JavaScript into versions compatible with current and older browsers or environments.babel.dev · 29 Sept 2026

Transforms

Its toolchain can transform syntax, polyfill features through third-party polyfills such as core-js, and perform source code transformations called codemods.babel.dev · 29 Sept 2026

JavaScript support

Babel provides syntax transformers for the latest version of JavaScript.babel.dev · 29 Sept 2026

React

Babel can convert JSX syntax using its React preset.babel.dev · 29 Sept 2026

Type annotations

Babel can strip Flow and TypeScript type annotations, but it does not perform type checking.babel.dev · 29 Sept 2026

Plugins

Babel's transformation pipeline is built from plugins, which users can combine into presets or write themselves.babel.dev · 29 Sept 2026

Debugging

Babel supports source maps for debugging compiled code.babel.dev · 29 Sept 2026

CLI

The Babel CLI compiles files from the command line and supports compiling files or directories, watching for changes, and generating source maps.babel.dev · 29 Sept 2026

Package managers

The docs show installation with npm, Yarn, pnpm, or Bun.babel.dev · 29 Sept 2026

Browser use

The standalone build can run in browsers and other non-Node.js environments, including compiling scripts marked text/babel or text/jsx.babel.dev · 29 Sept 2026

Production limitation

The docs recommend using a Node.js build system to transpile ahead of time instead of using the standalone build in production.babel.dev · 29 Sept 2026

Community and support

Babel says it is maintained by volunteers and directs support questions to GitHub Discussions, Slack, Stack Overflow, or Bluesky.github.com · 29 Sept 2026

License

The Babel repository identifies its license as MIT.github.com · 29 Sept 2026

Funding

Babel says the project is funded by the community and invites users to contribute time or sponsor it.babel.dev · 29 Sept 2026

Where it ranks on Everything Xiaomi

• Best Code Transpilers in 2026#4 of 28

Sources

• babel.dev/docs/· checked 29 Sept 2026
• babel.dev/docs/babel-cli· checked 29 Sept 2026
• babel.dev/docs/babel-standalone· checked 29 Sept 2026
• github.com/babel/babel· checked 29 Sept 2026
• babel.dev· checked 29 Sept 2026