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---
title: SWC
---
SWC support is built-in via the `--swc` flag or `"swc": true` tsconfig option.
[SWC](https://swc.rs) is a TypeScript-compatible transpiler implemented in Rust. This makes it an order of magnitude faster than vanilla `transpileOnly`.
To use it, first install `@swc/core` or `@swc/wasm`. If using `importHelpers`, also install `@swc/helpers`. If `target` is less than "es2015" and using `async`/`await` or generator functions, also install `regenerator-runtime`.
```shell
npm i -D @swc/core @swc/helpers regenerator-runtime
```
Then add the following to your `tsconfig.json`.
```json title="tsconfig.json"
{
"ts-node": {
"swc": true
}
}
```
> SWC uses `@swc/helpers` instead of `tslib`. If you have enabled `importHelpers`, you must also install `@swc/helpers`.
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