JavaScript Rust TypeScript parser Compiler ecmascript Babel Shell Python ecmascript-parser closure-compiler swc typescript-compiler typescript-parser
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swc is a super-fast compiler written in rust; producing widely-supported javascript from modern standards and typescript.

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Make the web (development) faster.

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swc is a super-fast typescript / javascript compiler written in rust.


Check out the documentation in the website.


Please see comparison with babel.


The lower bound of the speedup compared to babel is 18. The benchmarks were run on Macbook pro, dual core, 2.3GHz Intel Core i5, 16 GB ram

| | performance | | ------------------ | :------------------------------------: | | swc (es3) | 761 ops/sec ±0.23% (89 runs sampled) | | swc (es2015) | 800 ops/sec ±1.02% (87 runs sampled) | | swc (es2016) | 2123 ops/sec ±0.84% (88 runs sampled) | | swc (es2017) | 2131 ops/sec ±1.13% (90 runs sampled) | | swc (es2018) | 2981 ops/sec ±0.25% (90 runs sampled) | | swc-optimize (es3) | 712 ops/sec ±0.21% (86 runs sampled) | | babel | 41.75 ops/sec ±8.07% (56 runs sampled) |

Supporting swc

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swc is a community-driven project, 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 Slack for guidance!)
  • Slackin for swc
  • Giving funds by becoming a sponsor (see below)!

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Become a sponsor and get your logo on our README on Github with a link to your site. [Become a sponsor]

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Become a backer and get your image on our README on Github with a link to your site.


See You may also find the architecture documentation useful (


swc is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0).


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