Get Started

Welcome to Bun Installation Quickstart TypeScript TypeScript 6 and 7

Watch Mode Debugging REPL bunfig.toml File Types Module Resolution JSX Auto-install Plugins File System Router

Cookies File I/O Streams Binary Data Archive SQL SQLite S3 Redis Workers Environment Variables Shell Spawn WebView Cron Node-API FFI C Compiler Transpiler CSRF Protection Secrets Console TOML YAML Markdown JSON5 JSONL HTMLRewriter Image Hashing Glob Semver Color Utils Globals Bun APIs Web APIs Node.js Compatibility

Standards & Compatibility

FFI

Use Bun's FFI module to efficiently call native libraries from JavaScript

Node-API

Use Bun's Node-API module to build native add-ons to Node.js

C Compiler

Compile and run C from JavaScript with low overhead

On this page

dlopen usage (bun:ffi)Performance Usage Zig Rust C++FFI types Strings Function pointers Callbacks Experimental thread-safe callbacks Pointers Memory management From JavaScript From C, Rust, Zig, etc Memory safety Pointer alignment Passing a pointer Reading pointers