# Compress and decompress data with DEFLATE (/docs/guides/util/deflate)

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Related: [Upgrade Bun to the latest version](/docs/guides/util/upgrade.md), [Detect when code is executed with Bun](/docs/guides/util/detect-bun.md), [Get the current Bun version](/docs/guides/util/version.md), [Hash a password](/docs/guides/util/hash-a-password.md), [Generate a UUID](/docs/guides/util/javascript-uuid.md), [Encode and decode base64 data](/docs/guides/util/base64.md)

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

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

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

***

See [Utils](/runtime/utils).