⚓ Oxc

/oʊ ɛks siː/

The Oxidation Compiler is a collection of high-performance tools for JavaScript and TypeScript written in Rust.

Oxc is part of VoidZero’s vision for a unified, high-performance toolchain for JavaScript. It powers Rolldown (Vite’s future bundler) and enables the next generation of ultra-fast development tools that work seamlessly together.

For more information, check out our website at oxc.rs.

_{* Oxidation is the chemical process that creates rust}

🏗️ Design Principles

• undefinedPerformance: Through rigorous performance engineering.
• undefinedCorrectness: Through conformance testing to standards and similar projects.
• undefinedDeveloper Experience: Clear APIs, comprehensive documentation, and sensible configuration.
• undefinedModular composability: Use individual components independently or compose them into complete toolchains.

Read more about our architecture and performance philosophy.

📦 Tools & Packages

Tool	npm	crates.io	Downloads
Linter	oxlint	-
Formatter	oxfmt	-
Parser	oxc-parser	oxc_parser
Transformer	oxc-transform	oxc_transformer
Minifier	oxc-minify	oxc_minifier
Resolver	oxc-resolver	oxc_resolver

See documentation for detailed usage guides for each tool.

⚡️ Quick Start

Linter

The production-ready linter catches mistakes for you with sensible defaults and optional configuration:

npx oxlint@latest

To give you an idea of its capabilities, here is an example from the vscode repository, which finishes linting 4800+ files in 0.7 seconds:

→ oxlint documentation

Formatter

Fast, opinionated code formatter compatible with Prettier:

npx oxfmt@latest

→ Formatter documentation

Parser (Node.js)

The fastest JavaScript/TypeScript parser written in Rust:

npm install oxc-parser

import { parseSync } from 'oxc-parser';
const result = parseSync('const x = 1;');

→ Parser documentation

Transformer (Node.js)

TypeScript, React, and modern JavaScript transformation:

npm install oxc-transform

import { transform } from 'oxc-transform';
const result = transform('source.tsx', code, { typescript: true });

→ Transformer documentation

Minifier (Node.js)

High-performance JavaScript minifier:

npm install oxc-minify

import { minify } from 'oxc-minify';
const result = minify(code, { mangle: true });

→ Minifier documentation

Rust

Individual crates are published for building your own JavaScript tools:

[dependencies]
oxc = "0.x"

→ Rust documentation

VoidZero Inc.

Oxc is a project of VoidZero, see our announcement Announcing VoidZero - Next Generation Toolchain for JavaScript.

If you have requirements for JavaScript tools at scale, please get in touch!

🙋 Who’s using Oxc?

Rolldown and Nuxt use Oxc for parsing. Rolldown also uses Oxc for transformation and minification. Nova, swc-node, and knip use oxc_resolver for module resolution. Preact, Shopify, ByteDance, and Shopee use oxlint for linting.

See more projects using Oxc →

✍️ Contribute

Check out some of the good first issues or ask us on Discord.

See CONTRIBUTING.md for guidance, or read the complete contributing guide on our website →

If you are unable to contribute by code, you can still participate by:

• Add a GitHub Star to the project
• Join us on Discord
• Follow me on X and post about this project

🤝 Credits

This project was incubated with the assistance of these exceptional mentors and their projects:

• Biome - @ematipico
• Ruff - @charliermarsh, @MichaReiser
• quick-lint-js - @strager
• elm-review - @jfmengels

Special thanks go to:

• @domonji for bootstrapping this project together and also completing the TypeScript parser
• @tongtong-lu and @guan-wy for designing the project logo

❤ Who’s Sponsoring Oxc?

📖 License

Oxc is free and open-source software licensed under the MIT License.

Oxc ports or copies code from other open source projects, their licenses are listed in undefinedThird-party library licensesundefined.