# Compress and decompress data with gzip

Use `Bun.gzipSync()` to compress a `Uint8Array` with gzip.

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

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

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See [Utils](/runtime/utils).