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

File I/O

Bun provides a set of optimized APIs for reading and writing files.

Cookies

Use Bun's native APIs for working with HTTP cookies

Streams

Use Bun's streams API to work with binary data without loading it all into memory at once

On this page

Reading files (Bun.file())Deleting files (file.delete())Writing files (Bun.write())Incremental writing with FileSink Directories Reading directories (readdir)Reading directories recursively Creating directories (mkdir)Benchmarks Reference