Biome Has a Free Code Formatter and Linter — Replace ESLint and Prettier with One Tool

Biome is a fast formatter and linter for JavaScript, TypeScript, JSON, CSS — one tool to replace ESLint + Prettier.

What You Get for Free

• Formatter — Prettier-compatible, 35x faster
• Linter — 300+ rules, many from ESLint and typescript-eslint
• Import sorting — automatic, no plugin needed
• JSON & CSS — lint and format, not just JS/TS
• Zero config — works out of the box with sensible defaults
• Editor support — VS Code, IntelliJ, Neovim extensions
• CI integration — biome ci for CI pipelines
• Migration tool — auto-migrate from ESLint/Prettier configs

Quick Start

npx @biomejs/biome init
npx @biomejs/biome check --write .

That's it. Your entire codebase is formatted and linted.

Why Developers Switch from ESLint + Prettier

Two tools, two configs, plugin conflicts, slow CI:

• 35x faster — written in Rust, not JavaScript
• One tool — no ESLint + Prettier conflicts
• Zero plugins — import sorting, accessibility rules built-in
• One config — biome.json replaces .eslintrc + .prettierrc

A monorepo's CI ran ESLint + Prettier in 4 minutes. After switching to Biome: 7 seconds. Same rules, same formatting. Developer machines also got instant saves back.

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