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Ultracite v7

Ultracite v7

Opinionated, zero-config code linter and formatter

Website ultracite.ai
Overview

What it is

Ultracite is a fast, intuitive dev tool that brings automated code formatting and linting to your JS / TS projects. Built on top of Biome (a Rust-based code formatter), Ultracite provides a robust, preconfigured setup optimized for modern web development.

Intent

I need it when

Automatically fix code issues and enforce type-safe patterns across projects

Ultracite auto-fixes safe and deterministic issues including formatting, unused imports, and code transformations, with optional unsafe fixes for behavior-changing rewrites, reducing manual code review friction

Integrate linting seamlessly into development workflows across multiple editors and IDEs

Ultracite generates configuration files for 40+ editors and IDEs (VS Code, Cursor, Zed, etc.) with format-on-save, auto-fixes, and TypeScript defaults, plus MCP support for linting without local execution

Replace multiple linting and formatting tools with a single faster solution

Ultracite consolidates ESLint, Prettier, and Stylelint functionality into one Rust-based tool via Biome, eliminating tool conflicts and reducing setup complexity while improving performance

Ensure AI agents and human developers write code with identical style and quality standards

Ultracite supports 40+ AI agents (Claude, Cursor, GitHub Copilot, etc.) with automatic agent hook configuration and editor file generation, enabling consistent code style across all team members and AI models

Eliminate configuration overhead and adopt code quality best practices immediately

Ultracite provides zero-config preset for ESLint, Biome, and Oxlint with hundreds of framework-specific rules, allowing teams to ship consistent code in seconds without manual rule selection or configuration decisions

Drop

Not a fit when

  • Projects requiring non-JavaScript/TypeScript linting and formatting (Ultracite supports only JS, TS, JSX, CSS, and GraphQL)
  • Teams that heavily customize ESLint rules and prefer granular control over every linting decision
  • Organizations needing proprietary or specialized ESLint plugins not supported by Biome
  • Projects already deeply invested in complex Prettier or Stylelint configurations that cannot be migrated
  • Developers who require real-time linting in IDEs other than VS Code, Cursor, Windsurf, or Zed without CLI usage
Commercials

Pricing

Free and open source