Oxc Has a Free API: The JavaScript Toolchain Written in Rust That's 100x Faster

ESLint, Babel, Prettier — they're all written in JavaScript. Oxc rewrites them in Rust and makes them 100x faster.

What Is Oxc?

Oxc (Oxidation Compiler) is a collection of JavaScript/TypeScript tools written in Rust:

• Parser — 3x faster than SWC, 20x faster than Babel
• Linter — 50-100x faster than ESLint
• Resolver — 28x faster than enhanced-resolve
• Transformer — Babel-compatible transforms in Rust
• Minifier — coming soon (terser replacement)

The Linter

npx oxlint@latest
# Lints your entire project in milliseconds

On a 10,000-file project:

• ESLint: 45 seconds
• Oxlint: 0.4 seconds

That's not a typo. Sub-second linting on massive codebases.

# 400+ built-in rules
npx oxlint --deny-warnings

# With config
npx oxlint -c oxlintrc.json

What Rules?

Oxlint includes rules from:

• eslint (core rules)
• typescript-eslint
• eslint-plugin-react
• eslint-plugin-react-hooks
• eslint-plugin-jsx-a11y
• eslint-plugin-import
• eslint-plugin-unicorn
• eslint-plugin-jest
• eslint-plugin-nextjs

All built in. No plugins to install.

Use With ESLint

You don't have to replace ESLint entirely. Use Oxlint for fast rules, ESLint for complex ones:

# Oxlint handles the fast stuff, ESLint handles what Oxlint can't
npx oxlint && npx eslint .

Turn off in ESLint what Oxlint already covers → ESLint runs 3-5x faster on the remaining rules.

Why Oxc Matters

• 100x faster — feedback loop measured in milliseconds, not seconds
• Drop-in — same rules, same behavior as ESLint equivalents
• Memory efficient — uses 10x less RAM than JavaScript-based tools
• Foundation — Oxc's parser powers Rolldown (Vite's future bundler)

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Building JavaScript toolchains? Check out my developer tools or email [e-mail].