<p align="center"> <a href="https://bun.com"><img src="https://github.com/user-attachments/assets/50282090-adfd-4ddb-9e27-c30753c6b161" alt="Logo" height=170></a> </p> <h1 align="center">Bun</h1> <p align="center"> <a href="https://bun.com/discord" target="_blank"><img height=20 src="https://img.shields.io/discord/876711213126520882" /></a> <img src="https://img.shields.io/github/stars/oven-sh/bun" alt="stars"> <a href="https://twitter.com/jarredsumner/status/1542824445810642946"><img src="https://img.shields.io/static/v1?label=speed&message=fast&color=success" alt="Bun speed" /></a> </p> <div align="center"> <a href="https://bun.com/docs">Documentation</a> <span> • </span> <a href="https://bun.com/discord">Discord</a> <span> • </span> <a href="https://github.com/oven-sh/bun/issues/new">Issues</a> <span> • </span> <a href="https://github.com/oven-sh/bun/issues/159">Roadmap</a> <br /> </div> ### [Read the docs →](https://bun.com/docs) ## What is Bun? Bun is an all-in-one toolkit for JavaScript and TypeScript apps. It ships as a single executable called `bun`. At its core is the _Bun runtime_, a fast JavaScript runtime designed as **a drop-in replacement for Node.js**. It's written in Zig and powered by JavaScriptCore under the hood, dramatically reducing startup times and memory usage. ```bash bun run index.tsx # TS and JSX supported out-of-the-box ``` The `bun` command-line tool also implements a test runner, script runner, and Node.js-compatible package manager. Instead of 1,000 node_modules for development, you only need `bun`. Bun's built-in tools are significantly faster than existing options and usable in existing Node.js projects with little to no changes. ```bash bun test # run tests bun run start # run the `start` script in `package.json` bun install <pkg> # install a package bunx cowsay 'Hello, world!' # execute a package ``` ## Install Bun supports Linux (x64 & arm64), macOS (x64 & Apple Silicon), and Windows (x64 & arm64). > **Linux users** — Kernel version 5.6 or higher is strongly recommended, but the minimum is 5.1. > **x64 users** — if you see "illegal instruction" or similar errors, check our [CPU requirements](https://bun.com/docs/installation#cpu-requirements-and-baseline-builds) ```sh # with install script (recommended) curl -fsSL https://bun.com/install | bash # on windows powershell -c "irm bun.sh/install.ps1 | iex" # with npm npm install -g bun # with Homebrew brew tap oven-sh/bun brew install bun # with Docker docker pull oven/bun docker run --rm --init --ulimit memlock=-1:-1 oven/bun ``` ### Upgrade To upgrade to the latest version of Bun, run: ```sh bun upgrade ``` Bun automatically releases a canary build on every commit to `main`. To upgrade to the latest canary build, run: ```sh bun upgrade --canary ``` [View canary build](https://github.com/oven-sh/bun/releases/tag/canary) ## Quick links - Intro - [What is Bun?](https://bun.com/docs/index) - [Installation](https://bun.com/docs/installation) - [Quickstart](https://bun.com/docs/quickstart) - [TypeScript](https://bun.com/docs/typescript) - [TypeScript 6](https://bun.com/docs/typescript-6) - Templating - [`bun init`](https://bun.com/docs/runtime/templating/init) - [`bun create`](https://bun.com/docs/runtime/templating/create) - Runtime - [`bun run`](https://bun.com/docs/runtime/index) - [File types (Loaders)](https://bun.com/docs/runtime/file-types) - [JSX](https://bun.com/docs/runtime/jsx) - [Environment variables](https://bun.com/docs/runtime/environment-variables) - [Bun APIs](https://bun.com/docs/runtime/bun-apis) - [Web APIs](https://bun.com/docs/runtime/web-apis) - [Node.js compatibility](https://bun.com/docs/runtime/nodejs-compat) - [Plugins](https://bun.com/docs/runtime/plugins) - [Watch mode / Hot Reloading](https://bun.com/docs/runtime/watch-mode) - [Module resolution](https://bun.com/docs/runtime/module-resolution) - [Auto-install](https://bun.com/docs/runtime/auto-install) - [bunfig.toml](https://bun.com/docs/runtime/bunfig) - [Debugger](https://bun.com/docs/runtime/debugger) - [REPL](https://bun.com/docs/runtime/repl) - [$ Shell](https://bun.com/docs/runtime/shell) - Package manager - [`bun install`](https://bun.com/docs/pm/cli/install) - [`bun add`](https://bun.com/docs/pm/cli/add) - [`bun remove`](https://bun.com/docs/pm/cli/remove) - [`bun update`](https://bun.com/docs/pm/cli/update) - [`bun link`](https://bun.com/docs/pm/cli/link) - [`bun pm`](https://bun.com/docs/pm/cli/pm) - [`bun outdated`](https://bun.com/docs/pm/cli/outdated) - [`bun publish`](https://bun.com/docs/pm/cli/publish) - [`bun patch`](https://bun.com/docs/pm/cli/patch) - [`bun why`](https://bun.com/docs/pm/cli/why) - [`bun audit`](https://bun.com/docs/pm/cli/audit) - [`bun info`](https://bun.com/docs/pm/cli/info) - [Global cache](https://bun.com/docs/pm/global-cache) - [Global store](https://bun.com/docs/pm/global-store) - [Isolated installs](https://bun.com/docs/pm/isolated-installs) - [Workspaces](https://bun.com/docs/pm/workspaces) - [Catalogs](https://bun.com/docs/pm/catalogs) - [Lifecycle scripts](https://bun.com/docs/pm/lifecycle) - [Filter](https://bun.com/docs/pm/filter) - [Lockfile](https://bun.com/docs/pm/lockfile) - [Scopes and registries](https://bun.com/docs/pm/scopes-registries) - [Overrides and resolutions](https://bun.com/docs/pm/overrides) - [Security scanner API](https://bun.com/docs/pm/security-scanner-api) - [`.npmrc`](https://bun.com/docs/pm/npmrc) - Bundler - [`Bun.build`](https://bun.com/docs/bundler/index) - [Loaders](https://bun.com/docs/bundler/loaders) - [Plugins](https://bun.com/docs/bundler/plugins) - [Macros](https://bun.com/docs/bundler/macros) - [vs esbuild](https://bun.com/docs/bundler/esbuild) - [Single-file executable](https://bun.com/docs/bundler/executables) - [CSS](https://bun.com/docs/bundler/css) - [HTML & static sites](https://bun.com/docs/bundler/html-static) - [Hot Module Replacement (HMR)](https://bun.com/docs/bundler/hot-reloading) - [Full-stack with HTML imports](https://bun.com/docs/bundler/fullstack) - [Standalone HTML](https://bun.com/docs/bundler/standalone-html) - [Bytecode caching](https://bun.com/docs/bundler/bytecode) - [Minifier](https://bun.com/docs/bundler/minifier) - Test runner - [`bun test`](https://bun.com/docs/test/index) - [Writing tests](https://bun.com/docs/test/writing-tests) - [Lifecycle hooks](https://bun.com/docs/test/lifecycle) - [Mocks](https://bun.com/docs/test/mocks) - [Snapshots](https://bun.com/docs/test/snapshots) - [Dates and times](https://bun.com/docs/test/dates-times) - [DOM testing](https://bun.com/docs/test/dom) - [Code coverage](https://bun.com/docs/test/code-coverage) - [Configuration](https://bun.com/docs/test/configuration) - [Discovery](https://bun.com/docs/test/discovery) - [Reporters](https://bun.com/docs/test/reporters) - [Runtime Behavior](https://bun.com/docs/test/runtime-behavior) - Package runner - [`bunx`](https://bun.com/docs/pm/bunx) - API - [HTTP server (`Bun.serve`)](https://bun.com/docs/runtime/http/server) - [HTTP routing](https://bun.com/docs/runtime/http/routing) - [HTTP error handling](https://bun.com/docs/runtime/http/error-handling) - [HTTP metrics](https://bun.com/docs/runtime/http/metrics) - [WebSockets](https://bun.com/docs/runtime/http/websockets) - [Workers](https://bun.com/docs/runtime/workers) - [Binary data](https://bun.com/docs/runtime/binary-data) - [Streams](https://bun.com/docs/runtime/streams) - [File I/O (`Bun.file`)](https://bun.com/docs/runtime/file-io) - [Archive (tar)](https://bun.com/docs/runtime/archive) - [SQLite (`bun:sqlite`)](https://bun.com/docs/runtime/sqlite) - [PostgreSQL (`Bun.sql`)](https://bun.com/docs/runtime/sql) - [Redis (`Bun.redis`)](https://bun.com/docs/runtime/redis) - [S3 Client (`Bun.s3`)](https://bun.com/docs/runtime/s3) - [FileSystemRouter](https://bun.com/docs/runtime/file-system-router) - [TCP sockets](https://bun.com/docs/runtime/networking/tcp) - [UDP sockets](https://bun.com/docs/runtime/networking/udp) - [Globals](https://bun.com/docs/runtime/globals) - [Child processes (spawn)](https://bun.com/docs/runtime/child-process) - [Cron (`Bun.cron`)](https://bun.com/docs/runtime/cron) - [WebView](https://bun.com/docs/runtime/webview) - [Transpiler (`Bun.Transpiler`)](https://bun.com/docs/runtime/transpiler) - [Hashing](https://bun.com/docs/runtime/hashing) - [Colors (`Bun.color`)](https://bun.com/docs/runtime/color) - [Console](https://bun.com/docs/runtime/console) - [FFI (`bun:ffi`)](https://bun.com/docs/runtime/ffi) - [C Compiler (`bun:ffi` cc)](https://bun.com/docs/runtime/c-compiler) - [HTMLRewriter](https://bun.com/docs/runtime/html-rewriter) - [Cookies (`Bun.Cookie`)](https://bun.com/docs/runtime/cookies) - [CSRF (`Bun.CSRF`)](https://bun.com/docs/runtime/csrf) - [Secrets (`Bun.secrets`)](https://bun.com/docs/runtime/secrets) - [YAML (`Bun.YAML`)](https://bun.com/docs/runtime/yaml) - [TOML (`Bun.TOML`)](https://bun.com/docs/runtime/toml) - [JSON5](https://bun.com/docs/runtime/json5) - [JSONL](https://bun.com/docs/runtime/jsonl) - [Markdown](https://bun.com/docs/runtime/markdown) - [Image processing](https://bun.com/docs/runtime/image) - [Utils](https://bun.com/docs/runtime/utils) - [Node-API](https://bun.com/docs/runtime/node-api) - [Glob (`Bun.Glob`)](https://bun.com/docs/runtime/glob) - [Semver (`Bun.semver`)](https://bun.com/docs/runtime/semver) - [DNS](https://bun.com/docs/runtime/networking/dns) - [fetch API extensions](https://bun.com/docs/runtime/networking/fetch) ## Guides - Deployment - [Deploy to Vercel](https://bun.com/guides/deployment/vercel) - [Deploy to Railway](https://bun.com/guides/deployment/railway) - [Deploy to Render](https://bun.com/guides/deployment/render) - [Deploy to AWS Lambda](https://bun.com/guides/deployment/aws-lambda) - [Deploy to DigitalOcean](https://bun.com/guides/deployment/digital-ocean) - [Deploy to Google Cloud Run](https://bun.com/guides/deployment/google-cloud-run) - Binary - [Convert a Blob to a string](https://bun.com/guides/binary/blob-to-string) - [Convert a Buffer to a blob](https://bun.com/guides/binary/buffer-to-blob) - [Convert a Blob to a DataView](https://bun.com/guides/binary/blob-to-dataview) - [Convert a Buffer to a string](https://bun.com/guides/binary/buffer-to-string) - [Convert a Blob to a ReadableStream](https://bun.com/guides/binary/blob-to-stream) - [Convert a Blob to a Uint8Array](https://bun.com/guides/binary/blob-to-typedarray) - [Convert a DataView to a string](https://bun.com/guides/binary/dataview-to-string) - [Convert a Uint8Array to a Blob](https://bun.com/guides/binary/typedarray-to-blob) - [Convert a Blob to an ArrayBuffer](https://bun.com/guides/binary/blob-to-arraybuffer) - [Convert an ArrayBuffer to a Blob](https://bun.com/guides/binary/arraybuffer-to-blob) - [Convert a Buffer to a Uint8Array](https://bun.com/guides/binary/buffer-to-typedarray) - [Convert a Uint8Array to a Buffer](https://bun.com/guides/binary/typedarray-to-buffer) - [Convert a Uint8Array to a string](https://bun.com/guides/binary/typedarray-to-string) - [Convert a Buffer to an ArrayBuffer](https://bun.com/guides/binary/buffer-to-arraybuffer) - [Convert an ArrayBuffer to a Buffer](https://bun.com/guides/binary/arraybuffer-to-buffer) - [Convert an ArrayBuffer to a string](https://bun.com/guides/binary/arraybuffer-to-string) - [Convert a Uint8Array to a DataView](https://bun.com/guides/binary/typedarray-to-dataview) - [Convert a Buffer to a ReadableStream](https://bun.com/guides/binary/buffer-to-readablestream) - [Convert a Uint8Array to an ArrayBuffer](https://bun.com/guides/binary/typedarray-to-arraybuffer) - [Convert an ArrayBuffer to a Uint8Array](https://bun.com/guides/binary/arraybuffer-to-typedarray) - [Convert an ArrayBuffer to an array of numbers](https://bun.com/guides/binary/arraybuffer-to-array) - [Convert a Uint8Array to a ReadableStream](https://bun.com/guides/binary/typedarray-to-readablestream) - Ecosystem - [Use React and JSX](https://bun.com/guides/ecosystem/react) - [Use Gel with Bun](https://bun.com/guides/ecosystem/gel) - [Use Prisma with Bun](https://bun.com/guides/ecosystem/prisma) - [Use Prisma Postgres with Bun](https://bun.com/guides/ecosystem/prisma-postgres) - [Add Sentry to a Bun app](https://bun.com/guides/ecosystem/sentry) - [Create a Discord bot](https://bun.com/guides/ecosystem/discordjs) - [Run Bun as a daemon with PM2](https://bun.com/guides/ecosystem/pm2) - [Use Drizzle ORM with Bun](https://bun.com/guides/ecosystem/drizzle) - [Use Upstash Redis with Bun](https://bun.com/guides/ecosystem/upstash) - [Build an app with Nuxt and Bun](https://bun.com/guides/ecosystem/nuxt) - [Build an app with Qwik and Bun](https://bun.com/guides/ecosystem/qwik) - [Build an app with Astro and Bun](https://bun.com/guides/ecosystem/astro) - [Build an app with Remix and Bun](https://bun.com/guides/ecosystem/remix) - [Build a frontend using Vite and Bun](https://bun.com/guides/ecosystem/vite) - [Build an app with Next.js and Bun](https://bun.com/guides/ecosystem/nextjs) - [Run Bun as a daemon with systemd](https://bun.com/guides/ecosystem/systemd) - [Build an HTTP server using Hono and Bun](https://bun.com/guides/ecosystem/hono) - [Build an app with SvelteKit and Bun](https://bun.com/guides/ecosystem/sveltekit) - [Build an app with SolidStart and Bun](https://bun.com/guides/ecosystem/solidstart) - [Build an app with TanStack Start and Bun](https://bun.com/guides/ecosystem/tanstack-start) - [Build an HTTP server using Elysia and Bun](https://bun.com/guides/ecosystem/elysia) - [Build an HTTP server using StricJS and Bun](https://bun.com/guides/ecosystem/stric) - [Containerize a Bun application with Docker](https://bun.com/guides/ecosystem/docker) - [Build an HTTP server using Express and Bun](https://bun.com/guides/ecosystem/express) - [Use Neon Postgres through Drizzle ORM](https://bun.com/guides/ecosystem/neon-drizzle) - [Server-side render (SSR) a React component](https://bun.com/guides/ecosystem/ssr-react) - [Read and write data to MongoDB using Mongoose and Bun](https://bun.com/guides/ecosystem/mongoose) - [Use Neon's Serverless Postgres with Bun](https://bun.com/guides/ecosystem/neon-serverless-postgres) - HTMLRewriter - [Extract links from a webpage using HTMLRewriter](https://bun.com/guides/html-rewriter/extract-links) - [Extract social share images and Open Graph tags](https://bun.com/guides/html-rewriter/extract-social-meta) - HTTP - [Hot reload an HTTP server](https://bun.com/guides/http/hot) - [Common HTTP server usage](https://bun.com/guides/http/server) - [Write a simple HTTP server](https://bun.com/guides/http/simple) - [Configure TLS on an HTTP server](https://bun.com/guides/http/tls) - [Send an HTTP request using fetch](https://bun.com/guides/http/fetch) - [Proxy HTTP requests using fetch()](https://bun.com/guides/http/proxy) - [Start a cluster of HTTP servers](https://bun.com/guides/http/cluster) - [Stream a file as an HTTP Response](https://bun.com/guides/http/stream-file) - [fetch with unix domain sockets in Bun](https://bun.com/guides/http/fetch-unix) - [Upload files via HTTP using FormData](https://bun.com/guides/http/file-uploads) - [Streaming HTTP Server with Async Iterators](https://bun.com/guides/http/stream-iterator) - [Streaming HTTP Server with Node.js Streams](https://bun.com/guides/http/stream-node-streams-in-bun) - [Server-Sent Events (SSE) with Bun](https://bun.com/guides/http/sse) - Install - [Add a dependency](https://bun.com/guides/install/add) - [Add a Git dependency](https://bun.com/guides/install/add-git) - [Add a peer dependency](https://bun.com/guides/install/add-peer) - [Add a trusted dependency](https://bun.com/guides/install/trusted) - [Add a development dependency](https://bun.com/guides/install/add-dev) - [Add a tarball dependency](https://bun.com/guides/install/add-tarball) - [Add an optional dependency](https://bun.com/guides/install/add-optional) - [Generate a yarn-compatible lockfile](https://bun.com/guides/install/yarnlock) - [Configuring a monorepo using workspaces](https://bun.com/guides/install/workspaces) - [Install a package under a different name](https://bun.com/guides/install/npm-alias) - [Install dependencies with Bun in GitHub Actions](https://bun.com/guides/install/cicd) - [Using bun install with Artifactory](https://bun.com/guides/install/jfrog-artifactory) - [Configure git to diff Bun's lockb lockfile](https://bun.com/guides/install/git-diff-bun-lockfile) - [Override the default npm registry for bun install](https://bun.com/guides/install/custom-registry) - [Using bun install with an Azure Artifacts npm registry](https://bun.com/guides/install/azure-artifacts) - [Migrate from npm install to bun install](https://bun.com/guides/install/from-npm-install-to-bun-install) - [Configure a private registry for an organization scope with bun install](https://bun.com/guides/install/registry-scope) - Process - [Read from stdin](https://bun.com/guides/process/stdin) - [Listen for CTRL+C](https://bun.com/guides/process/ctrl-c) - [Spawn a child process](https://bun.com/guides/process/spawn) - [Listen to OS signals](https://bun.com/guides/process/os-signals) - [Parse command-line arguments](https://bun.com/guides/process/argv) - [Read stderr from a child process](https://bun.com/guides/process/spawn-stderr) - [Read stdout from a child process](https://bun.com/guides/process/spawn-stdout) - [Get the process uptime in nanoseconds](https://bun.com/guides/process/nanoseconds) - [Spawn a child process and communicate using IPC](https://bun.com/guides/process/ipc) - Read file - [Read a JSON file](https://bun.com/guides/read-file/json) - [Check if a file exists](https://bun.com/guides/read-file/exists) - [Read a file as a string](https://bun.com/guides/read-file/string) - [Read a file to a Buffer](https://bun.com/guides/read-file/buffer) - [Get the MIME type of a file](https://bun.com/guides/read-file/mime) - [Watch a directory for changes](https://bun.com/guides/read-file/watch) - [Read a file as a ReadableStream](https://bun.com/guides/read-file/stream) - [Read a file to a Uint8Array](https://bun.com/guides/read-file/uint8array) - [Read a file to an ArrayBuffer](https://bun.com/guides/read-file/arraybuffer) - Runtime - [Delete files](https://bun.com/guides/runtime/delete-file) - [Run a Shell Command](https://bun.com/guides/runtime/shell) - [Import a JSON file](https://bun.com/guides/runtime/import-json) - [Import a TOML file](https://bun.com/guides/runtime/import-toml) - [Import a YAML file](https://bun.com/guides/runtime/import-yaml) - [Import a JSON5 file](https://bun.com/guides/runtime/import-json5) - [Set a time zone in Bun](https://bun.com/guides/runtime/timezone) - [Set environment variables](https://bun.com/guides/runtime/set-env) - [Re-map import paths](https://bun.com/guides/runtime/tsconfig-paths) - [Delete directories](https://bun.com/guides/runtime/delete-directory) - [Read environment variables](https://bun.com/guides/runtime/read-env) - [Import a HTML file as text](https://bun.com/guides/runtime/import-html) - [Install and run Bun in GitHub Actions](https://bun.com/guides/runtime/cicd) - [Debugging Bun with the web debugger](https://bun.com/guides/runtime/web-debugger) - [Install TypeScript declarations for Bun](https://bun.com/guides/runtime/typescript) - [Debugging Bun with the VS Code extension](https://bun.com/guides/runtime/vscode-debugger) - [Inspect memory usage using V8 heap snapshots](https://bun.com/guides/runtime/heap-snapshot) - [Define and replace static globals & constants](https://bun.com/guides/runtime/define-constant) - [Build-time constants with --define](https://bun.com/guides/runtime/build-time-constants) - [Codesign a single-file JavaScript executable on macOS](https://bun.com/guides/runtime/codesign-macos-executable) - Streams - [Convert a ReadableStream to JSON](https://bun.com/guides/streams/to-json) - [Convert a ReadableStream to a Blob](https://bun.com/guides/streams/to-blob) - [Convert a ReadableStream to a Buffer](https://bun.com/guides/streams/to-buffer) - [Convert a ReadableStream to a string](https://bun.com/guides/streams/to-string) - [Convert a ReadableStream to a Uint8Array](https://bun.com/guides/streams/to-typedarray) - [Convert a ReadableStream to an array of chunks](https://bun.com/guides/streams/to-array) - [Convert a Node.js Readable to JSON](https://bun.com/guides/streams/node-readable-to-json) - [Convert a ReadableStream to an ArrayBuffer](https://bun.com/guides/streams/to-arraybuffer) - [Convert a Node.js Readable to a Blob](https://bun.com/guides/streams/node-readable-to-blob) - [Convert a Node.js Readable to a string](https://bun.com/guides/streams/node-readable-to-string) - [Convert a Node.js Readable to an Uint8Array](https://bun.com/guides/streams/node-readable-to-uint8array) - [Convert a Node.js Readable to an ArrayBuffer](https://bun.com/guides/streams/node-readable-to-arraybuffer) - Test - [Spy on methods in `bun test`](https://bun.com/guides/test/spy-on) - [Bail early with the Bun test runner](https://bun.com/guides/test/bail) - [Mock functions in `bun test`](https://bun.com/guides/test/mock-functions) - [Run tests in watch mode with Bun](https://bun.com/guides/test/watch-mode) - [Use snapshot testing in `bun test`](https://bun.com/guides/test/snapshot) - [Skip tests with the Bun test runner](https://bun.com/guides/test/skip-tests) - [Using Testing Library with Bun](https://bun.com/guides/test/testing-library) - [Update snapshots in `bun test`](https://bun.com/guides/test/update-snapshots) - [Run your tests with the Bun test runner](https://bun.com/guides/test/run-tests) - [Set the system time in Bun's test runner](https://bun.com/guides/test/mock-clock) - [Set a per-test timeout with the Bun test runner](https://bun.com/guides/test/timeout) - [Migrate from Jest to Bun's test runner](https://bun.com/guides/test/migrate-from-jest) - [Write browser DOM tests with Bun and happy-dom](https://bun.com/guides/test/happy-dom) - [Mark a test as a "todo" with the Bun test runner](https://bun.com/guides/test/todo-tests) - [Re-run tests multiple times with the Bun test runner](https://bun.com/guides/test/rerun-each) - [Generate code coverage reports with the Bun test runner](https://bun.com/guides/test/coverage) - [import, require, and test Svelte components with bun test](https://bun.com/guides/test/svelte-test) - [Set a code coverage threshold with the Bun test runner](https://bun.com/guides/test/coverage-threshold) - [Selectively run tests concurrently with glob patterns](https://bun.com/guides/test/concurrent-test-glob) - Util - [Generate a UUID](https://bun.com/guides/util/javascript-uuid) - [Hash a password](https://bun.com/guides/util/hash-a-password) - [Escape an HTML string](https://bun.com/guides/util/escape-html) - [Get the current Bun version](https://bun.com/guides/util/version) - [Upgrade Bun to the latest version](https://bun.com/guides/util/upgrade) - [Encode and decode base64 strings](https://bun.com/guides/util/base64) - [Compress and decompress data with gzip](https://bun.com/guides/util/gzip) - [Sleep for a fixed number of milliseconds](https://bun.com/guides/util/sleep) - [Detect when code is executed with Bun](https://bun.com/guides/util/detect-bun) - [Check if two objects are deeply equal](https://bun.com/guides/util/deep-equals) - [Compress and decompress data with DEFLATE](https://bun.com/guides/util/deflate) - [Get the absolute path to the current entrypoint](https://bun.com/guides/util/main) - [Get the directory of the current file](https://bun.com/guides/util/import-meta-dir) - [Check if the current file is the entrypoint](https://bun.com/guides/util/entrypoint) - [Get the file name of the current file](https://bun.com/guides/util/import-meta-file) - [Convert a file URL to an absolute path](https://bun.com/guides/util/file-url-to-path) - [Convert an absolute path to a file URL](https://bun.com/guides/util/path-to-file-url) - [Get the absolute path of the current file](https://bun.com/guides/util/import-meta-path) - [Get the path to an executable bin file](https://bun.com/guides/util/which-path-to-executable-bin) - WebSocket - [Build a publish-subscribe WebSocket server](https://bun.com/guides/websocket/pubsub) - [Build a simple WebSocket server](https://bun.com/guides/websocket/simple) - [Enable compression for WebSocket messages](https://bun.com/guides/websocket/compression) - [Set per-socket contextual data on a WebSocket](https://bun.com/guides/websocket/context) - Write file - [Delete a file](https://bun.com/guides/write-file/unlink) - [Write to stdout](https://bun.com/guides/write-file/stdout) - [Write a file to stdout](https://bun.com/guides/write-file/cat) - [Write a Blob to a file](https://bun.com/guides/write-file/blob) - [Write a string to a file](https://bun.com/guides/write-file/basic) - [Append content to a file](https://bun.com/guides/write-file/append) - [Write a file incrementally](https://bun.com/guides/write-file/filesink) - [Write a Response to a file](https://bun.com/guides/write-file/response) - [Copy a file to another location](https://bun.com/guides/write-file/file-cp) - [Write a ReadableStream to a file](https://bun.com/guides/write-file/stream) ## Contributing Refer to the [Project > Contributing](https://bun.com/docs/project/contributing) guide to start contributing to Bun. ## License Refer to the [Project > License](https://bun.com/docs/project/license) page for information about Bun's licensing.
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bun
oven-sh/bun
Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one
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View the full source code, contribute, and explore on GitHub
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April 14, 2021
Last Updated
May 29, 2026
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