What is 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.

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

Fastest tooling across the stack

Oxc focuses on performance across the whole toolchain. This includes parsing, module resolution, linting, formatting, transforms, and minification.

Philosophy

Oxc is built around a few core ideas.

Performance is a feature

Oxc treats speed as a product requirement. Faster tools improve the local feedback loop and reduce CI cost. Performance regressions are treated as bugs.

One toolchain, shared building blocks

Oxc is a suite. Tools like the linter, formatter, parser, transformer, minifier, and resolver are built on shared components. This reduces duplicated work and makes behavior more consistent across the stack.

Correctness with clear boundaries

Oxc aims to be correct and predictable. When behavior differs from other tools, the differences should be documented. Compatibility is a feature, not an accident.

Practical developer experience

Oxc focuses on a workflow that works in real projects. Defaults should be sensible, configuration should be understandable, and output should be stable.

What you get

Oxc includes end-user tools and reusable compiler building blocks:

• Oxlint is the fastest linter for JavaScript and TypeScript.
• Oxfmt is the fastest formatter. It targets Prettier-compatible formatting.
• Parser is the fastest JS and TS parser with an AST for tooling.
• Transformer provides fastest TS, JSX, and modern JavaScript transforms.
• Minifier is the fastest minifier for production output.
• Resolver is the fastest module resolver for JS and TS projects.

You can use each tool on its own, or use them together as one toolchain.

Who Oxc is for

• App and library developers who want the fastest lint and format loop locally and in CI.
• Toolchain and platform teams who want a fast compiler-grade foundation at scale.
• Tool authors who want fast reusable crates or npm packages for JS tooling.