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Bun is an incredibly fast all-in-one JavaScript toolkit
Bun is an incredibly fast all-in-one toolkit for building, installing, running, and testing JavaScript and TypeScript. We were born out of frustration with the fragmented, slow JavaScript ecosystem and are on a mission to make JavaScript development faster and more productive.
Bun is a fast, all-in-one JavaScript runtime that bundles a native bundler, transpiler, task runner, and npm client built in. It positions itself as a drop-in replacement and toolkit for Node.js ecosystems, offering runtime, package management, testing, bundling, and more within a single platform.
Bun provides a JavaScript/TypeScript runtime with built-in tooling including a native bundler, transpiler, task runner, package manager (npm client), test runner, and HTTP server. It supports Node.js compatibility, web standard APIs, a Bun.serve HTTP server, a WebSocket server, and built-in databases/drivers (PostgreSQL, MySQL, SQLite) with a unified API, plus features like single-file executables, cross-language native calls (Bun.ffi, NAPI), and YAML/Cookies/Secrets tooling. The site emphasizes an all-in-one toolkit that can be used as individual tools (bun test, bun install) or as an integrated stack with fast install/build/run cycles.
Who it’s for: Developers and teams building with JavaScript/TypeScript who want an all-in-one runtime and toolchain that accelerates development, testing, building, and deployment in Node.js-like environments.
Active product with multiple feature releases and versioned updates; mentions of integration with Anthropic and various tooling benchmarks imply active development and traction, plus public install script and cross-tool usage.
Bun is an all-in-one JavaScript runtime, bundler, package manager, test runner. We're making JavaScript faster. Our current goal is to replace Node.js as the default JavaScript runtime.
Formerly “Codeblog”, “Webthing” · why startups rename →
