371 releases (155 breaking)

new 0.156.18 Mar 24, 2023
0.155.4 Mar 12, 2023
0.145.18 Dec 21, 2022
0.145.1 Nov 30, 2022
0.11.0 Mar 30, 2021

#44 in Web programming

Download history 5125/week @ 2022-12-03 6154/week @ 2022-12-10 5450/week @ 2022-12-17 2177/week @ 2022-12-24 4859/week @ 2022-12-31 7705/week @ 2023-01-07 6600/week @ 2023-01-14 6999/week @ 2023-01-21 7378/week @ 2023-01-28 12447/week @ 2023-02-04 20090/week @ 2023-02-11 10493/week @ 2023-02-18 12903/week @ 2023-02-25 11282/week @ 2023-03-04 13405/week @ 2023-03-11 8658/week @ 2023-03-18

47,909 downloads per month
Used in 37 crates (6 directly)


52K SLoC


Make the web (development) faster.

downloads (@swc/core) downloads (3rd party)

undefined GitHub release (latest SemVer)

GitHub code size in bytes node-current (scoped)


SWC (stands for Speedy Web Compiler) is a super-fast TypeScript / JavaScript compiler written in Rust. It's a library for Rust and JavaScript at the same time. If you are using SWC from Rust, see rustdoc and for most users, your entry point for using the library will be parser.

Also, SWC tries to ensure that

If you select the latest version of each crates, it will work

for rust users.

MSRV of crates named swc_ecma_* is the current stable, and nightly for others.

If you are using SWC from JavaScript, please refer to docs on the website.


Check out the documentation in the website.


Please see comparison with babel.


Please see benchmark results on the website.

Supporting swc

Backers on Open Collective Gold sponsors on Open Collective Silver sponsors on Open Collective Bronze sponsors on Open Collective

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:


See CONTRIBUTING.md. You may also find the architecture documentation useful (ARCHITECTURE.md).


SWC is primarily distributed under the terms of the Apache License (Version 2.0).

See LICENSE for details.


~242K SLoC