# Compress and decompress data with DEFLATE

Use `Bun.deflateSync()` to compress a `Uint8Array` with DEFLATE.

```ts
const data = Buffer.from("Hello, world!");
const compressed = Bun.deflateSync(data);
// => Uint8Array

const decompressed = Bun.inflateSync(compressed);
// => Uint8Array
```

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See [Utils](/runtime/utils).