What it does
Biome is a toolchain for maintaining web projects. It combines formatting and linting features in a command-line tool and offers language-server support for editors. A project-level biome.json file can keep command-line and editor behavior consistent across a team. Biome is useful for JavaScript and TypeScript repositories that want common source checks without stitching together a separate formatter and linter for every task.
A quick way to evaluate Biome is to add it to one existing JavaScript or TypeScript project and run the documented biome check command. The official quick start supports installation through package managers including npm, pnpm, Yarn, Bun, and Deno, as well as a standalone executable. It then guides the reader to initialize the project configuration and run checks. These are documented commands, not a run performed for this listing.
Keep editor and terminal checks aligned
Biome can be configured with biome.json or biome.jsonc. The configuration guide recommends a per-project file so team members and supported editor integrations use the same settings. That is useful when a code review asks for stable formatting and consistent lint rules: run the same project configuration locally and in automation rather than keeping one set of rules in an editor preference.
Biome combines formatting with linting, while a formatter-only project such as Prettier has a narrower role. The official package README lists support for web-oriented formats including JavaScript, TypeScript, JSX, JSON, CSS, GraphQL, Markdown, YAML, and SCSS; check the specific feature support before replacing an existing toolchain. The repository provides the project under MIT or Apache-2.0 terms. This listing covers Biome's toolchain, not every extension or editor that can integrate with it.
Strengths
- One toolchain includes formatter and linter functionality for web projects.
- A project-level biome.json or biome.jsonc can align CLI and editor settings.
- The official quick start supports package-manager installation as well as a standalone executable.
Watch out for
- Biome is aimed at web-project files; teams working in other languages still need suitable language-specific tools.
Best for
- JavaScript and TypeScript projects that want formatting and lint checks from one toolchain.
- Teams that want editor integrations and command-line checks to share project configuration.
- Repositories evaluating a single formatter-and-linter workflow for web files.
Sources
- Biome, toolchain of the web (Oct 25, 2026)
- Quick start (Oct 25, 2026)
- Configure Biome (Oct 25, 2026)
- Biome package README (Oct 25, 2026)
- MIT License (Oct 25, 2026)