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UltraciteOxlint + Oxfmt

The fastest linter available

The fastest linter available. Oxlint is part of the Oxc project, running 50-100x faster than ESLint with a focus on catching bugs and reducing false positives.

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Configuration

Simple configuration files which extend the Ultracite configuration, giving you control over each aspect of linting and formatting.

Each config file is designed to be minimal while providing maximum coverage through Ultracite presets.

{  "$schema": "./node_modules/oxlint/configuration_schema.json",  "extends": [    "./node_modules/ultracite/config/oxlint/core/.oxlintrc.json",    "./node_modules/ultracite/config/oxlint/react/.oxlintrc.json",    "./node_modules/ultracite/config/oxlint/next/.oxlintrc.json"  ]}

Why choose Oxlint?

The fastest linter available. Oxlint is part of the Oxc project, running 50-100x faster than ESLint with a focus on catching bugs and reducing false positives.

50-100x faster

Lint your entire codebase in milliseconds. No more waiting for slow linting processes.

15 plugin equivalents

Built-in support for React, TypeScript, Next.js, Vue, Jest, Vitest, JSDoc, and more without extra deps.

Bug-focused rules

Prioritizes catching real bugs over stylistic issues. High signal-to-noise ratio.

Oxc ecosystem

Part of the larger Oxc project with parser, resolver, transformer, and minifier built for speed.

Category-based config

Rules organized into correctness, suspicious, pedantic, performance, restriction, and style categories.

Drop-in ready

Works alongside your existing ESLint setup or as a complete replacement with Oxfmt for formatting.

Trusted by top companies

And used by thousands of open source projects.

Vercel
Profound
Adobe
Clerk
Alan Turing Institite
Consent
VA
French Government
Tencent
Arcade
Axiom
Magic UI
Redpanda
Workday
ElevenLabs

What the community is saying

Here's what some of the most innovative and forward-thinking developers in the React ecosystem have to say about Ultracite.

See all tweets

Install in seconds. Run in milliseconds.

Install Ultracite and start shipping code faster in seconds.

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