Biome
Replaces ESLint + Prettier in one tool. Instant formatting, zero config.
In plain English
Like a spell checker and grammar checker combined, but for code. It fixes messy formatting (tabs vs spaces, line breaks) and catches common mistakes before they cause problems.
Real-world example
You and a teammate are both writing code. You use tabs, they use spaces. Your code looks different. Biome automatically reformats everything to look the same — and flags potential bugs while it's at it.
Where this fits in your project
This is your code quality layer — it keeps your code clean, consistent, and catches common mistakes.
When to use this
When you want one tool that formats AND lints your code. Replaces ESLint + Prettier with something 10x faster.
The situation
Your code formatting is inconsistent, or you're setting up a new project and want clean code from the start.
Good for
- + Any JavaScript/TypeScript project
- + Teams that want consistent style
- + Projects where ESLint is slow
Not ideal for
- - Non-JS projects
- - When you need very specific ESLint plugins
Getting started
Run `npm install --save-dev @biomejs/biome`, then `npx biome init` to create a config.