Bun, with native modules for Windows, Linux, Python, .NET, media and source graphs built in.

What each module does

Each page lists the platforms the module supports.

bun:adblock

Match network requests and cosmetic filters with Brave's adblock-rust engine, built into Bun.

bun:chromium

Chromium and Chrome CDP.

bun:cosmic

Use the COSMIC desktop from JavaScript.

bun:dotnet

Run the .NET SDK inside Bun, install and resolve .NET without scripts, run C# files, and call .NET assemblies from JavaScript.

bun:fetch

HTTP fetch with browser request headers; reports Cloudflare challenges without solving them.

bun:google

Google search and project contract.

bun:graph

Build, query and store code graphs of Rust, TypeScript, JavaScript and Markdown sources.

bun:graph-index

Code graphs of Rust, TypeScript, JavaScript and Markdown.

bun:graph-native

Code graphs of Rust, TypeScript, JavaScript and Markdown.

bun:graphx

Code graphs of Rust, TypeScript, JavaScript and Markdown.

bun:linux

Call Linux kernel interfaces directly from JavaScript.

bun:nginx

Validate, start, reload and stop an NGINX process from Bun.

bun:obscura

Chromium launcher sharing the bun:chromium owner.

bun:privacy

STAR threshold aggregation, Privacy Pass tokens and OPAQUE password authentication.

bun:python

Run Python files and the python CLI through a CPython host, embed CPython in the JavaScript process with bun:python, and compile Python with bun compile.

bun:rio

Rio-backed virtual terminal screen (Bun.RioTerminal).

bun:vitest

Vitest compatibility for bun test.

bun:wasm

WebAssembly surface of the Rust crates.

bun:windows

Call Windows interfaces directly from JavaScript.

bun:winrt

Call Windows Runtime (WinRT) APIs from Bun with bun:winrt, with namespaces projected on demand and async operations as Promises.

bun:winui

Open native WinUI 3 windows from Bun with bun:winui, load XAML, handle control events on the JS thread, and theme them with Fluent 2 tokens.

bun:yolo

Use bun:yolo to turn named yes/no, choice and score judgments into validated JavaScript values.

The tools Bun already has

Use each one on its own in an existing Node.js project, or all of them together.

bun run index.tsx

Run JavaScript, TypeScript and JSX on JavaScriptCore, with Node.js and Web APIs.

bun install

Install npm packages, manage workspaces and keep a text lockfile.

bun test

Run Jest-compatible tests with mocks, snapshots and watch mode.

bun build ./app.tsx

Bundle JavaScript, TypeScript, JSX and CSS for browsers or servers.

Bun.Video

Read media metadata, extract frames and create thumbnails in TypeScript. Native Rust decoding feeds the same resize, crop and encode pipeline as Bun.Image.

const video = new Bun.Video("clip.mp4");
const metadata = await video.metadata();
await video.frame(1).resize(320, 180).webp().write("preview.webp");

This clip and the others on the video page were rendered by Bun Video, frame by frame in Chromium and encoded to H.264 by FilmCraft, without FFmpeg.

Read the Bun.Video reference and the Bun.Image transforms.

Open source

Bun OS is developed by Aphrody Labs at aphrody-labs/bun and includes code from oven-sh/bun under its original licences. Packages are published under the @aphrody npm scope.

See the release notes, the benchmarks and the source inventory.