/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}

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

Read more about our architecture and performance philosophy.

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.

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

Fast, opinionated code formatter compatible with Prettier:

npx oxfmt@latest

→ Formatter documentation

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

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

High-performance JavaScript minifier:

npm install oxc-minify

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

→ Minifier documentation

Individual crates are published for building your own JavaScript tools:

[dependencies]
oxc = "0.x"

→ Rust documentation

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!

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 →

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

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

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 Third-party library licenses.