Opinionated, zero-config code linter and formatter
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 supports 40+ AI agents (Claude, Cursor, GitHub Copilot, etc.) with automatic agent hook configuration and editor file generation, enabling consistent code style enforcement across both human and AI-generated code.
Ultracite auto-generates configuration files for 40+ editors and agents, plus Git hooks (Husky, Lefthook, lint-staged, pre-commit), eliminating manual setup for framework-specific rules (React, Next.js, Vitest, etc.) and editor integrations.
Ultracite consolidates ESLint, Prettier, and Stylelint functionality into one Rust-based tool via Biome, reducing tool complexity, improving performance, and eliminating conflicts between separate linters and formatters.
Ultracite enables format-on-save and auto-fix capabilities across teams, automatically resolving formatting issues and common lint errors (unused imports, strict equality, etc.) before code review, reducing reviewer burden and debate.
Ultracite provides zero-config preset configuration for ESLint, Biome, and Oxlint with hundreds of framework-specific rules pre-enabled, allowing teams to ship consistent code without manual rule selection or debate over formatting standards.