ESLint to Biome Converter

Paste your ESLint configuration into DevBolt's ESLint to Biome Converter and it generates an equivalent biome.json. The tool maps over 100 ESLint rules to their Biome counterparts, translates rule severity levels, and extracts formatter settings from eslint-config-prettier. Biome is a fast Rust-based linter and formatter that replaces both ESLint and Prettier with a single tool, running 10-100x faster. After generating the Biome config, install Biome with npm install --save-dev @biomejs/biome, add it to your scripts, and remove ESLint and Prettier dependencies.

Biome supports equivalents for most commonly used ESLint core rules and popular plugin rules including eslint:recommended, @typescript-eslint/recommended, eslint-plugin-react, eslint-plugin-react-hooks, eslint-plugin-jsx-a11y, and eslint-plugin-import. Biome organizes rules into categories: correctness, suspicious, style, complexity, performance, and accessibility. Some ESLint rules have no direct Biome equivalent, particularly specialized plugin rules or rules requiring TypeScript type information. DevBolt's converter identifies unmapped rules and lists them separately so you know which need manual review after migration.

Biome combines linting and formatting in a single Rust-based tool that runs 10-100x faster than ESLint plus Prettier. This speeds up CI pipelines and editor feedback dramatically. Biome eliminates the configuration complexity of coordinating ESLint and Prettier. It provides consistent formatting without occasional conflicts between ESLint autofixes and Prettier. Biome requires a single biome.json instead of separate configs. The tradeoff is that Biome's rule library is smaller than ESLint's plugin ecosystem, so teams using niche plugins may need to keep ESLint for those specific rules.