Biomejs

Fast formatter and linter for JavaScript, TypeScript, and JSON with unified tooling.

Overview

Biome is a unified toolchain for web development that combines code formatting, linting, and analysis in a single tool. Built with Rust for performance, it offers 97% compatibility with Prettier for formatting and includes 514+ lint rules from ESLint, TypeScript ESLint, and other sources. The tool is designed to be fast, simple to set up, and works seamlessly across JavaScript, TypeScript, JSX, TSX, JSON, HTML, CSS, and GraphQL.

Biome can be installed as a development dependency and requires zero configuration to get started, though extensive options are available for customization. It integrates with popular editors like VS Code, IntelliJ, and Zed, and provides a command-line interface for formatting, linting, and checking code in CI/CD pipelines.

Key features

Fast Rust-based formatter and linter
514+ lint rules from ESLint and TypeScript ESLint
97% Prettier compatibility
Zero-configuration setup
Multi-language support (JS, TS, JSX, TSX, JSON, HTML, CSS, GraphQL)
Editor integrations (VS Code, IntelliJ, Zed)
Detailed, actionable diagnostics
Import organization
Safe auto-fixes

Pros

~35x faster than Prettier on large codebases
Single unified tool replaces multiple separate tools
Zero configuration needed to start
Excellent error messages with exact problem location and fixes
Built-in support for TypeScript and JSX
Handles malformed code during editing

Cons

97% Prettier compatibility means some edge cases may differ
Requires Node.js for npm installation (though standalone executable available)
Relatively newer tool compared to established ESLint/Prettier ecosystem

Use this if

You need a fast, all-in-one code quality tool that replaces ESLint and Prettier; you want zero-configuration setup; you're working with JavaScript, TypeScript, or web assets at scale.

Skip this if

You require 100% Prettier compatibility for edge cases; you prefer separate, specialized tools for different tasks; you need extensive third-party plugin ecosystems.

Best for

Web developers using JavaScript/TypeScriptTeams needing unified code quality toolsProjects migrating from ESLint and PrettierCI/CD pipelines requiring fast linting and formattingLarge codebases requiring scalable tooling

Alternatives

ESLintPrettierDenoRome (predecessor to Biome)

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