Fast, automated code formatting for JavaScript apps
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.
Ultracite's interactive init command auto-detects frameworks (React, Next.js, etc.), generates framework-specific configurations, and sets up editor integrations and Git hooks in seconds without manual setup.
Ultracite provides zero-config linting and formatting presets for ESLint, Biome, and Oxlint with sensible defaults, allowing teams to adopt consistent code standards immediately without manual rule configuration or style discussions.
Ultracite consolidates ESLint, Prettier, and Stylelint functionality into one Rust-based tool via Biome, eliminating tool conflicts, reducing configuration complexity, and improving performance through unified processing.
Ultracite auto-fixes safe and deterministic issues like unused imports, formatting violations, and simple transformations, reducing manual code review time and allowing reviewers to focus on logic and architecture rather than style compliance.
Ultracite supports 40+ AI agents (Claude, Cursor, GitHub Copilot, etc.) with automatic agent hook configuration and editor file generation, enabling both AI and human developers to follow identical code quality rules and formatting conventions.