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Alex Spinov
Alex Spinov

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

#biome #javascript #tooling #webdev

Why Biome?

Biome replaces ESLint + Prettier with a single tool written in Rust. It's 25x faster and needs zero config.

npm install --save-dev @biomejs/biome
npx biome init
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Format + Lint in One Command 

npx biome check .          # Lint + format check
npx biome check --write .  # Auto-fix everything
npx biome format --write . # Format only
npx biome lint .           # Lint only
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biome.json 

{
  "formatter": {
    "indentStyle": "space",
    "indentWidth": 2,
    "lineWidth": 100
  },
  "linter": {
    "rules": {
      "recommended": true,
      "suspicious": { "noExplicitAny": "warn" },
      "complexity": { "noForEach": "off" }
    }
  },
  "javascript": {
    "formatter": { "quoteStyle": "single", "semicolons": "asNeeded" }
  }
}
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Speed

Tool Time (1000 files)
Biome 0.3s
ESLint + Prettier 8s

25x faster. Written in Rust, parallel processing.

Migration from ESLint 

npx biome migrate eslint --write
npx biome migrate prettier --write
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Reads your .eslintrc and .prettierrc, converts to biome.json.

Need to extract data from any website at scale? I build custom web scrapers — 77 production scrapers running on Apify Store. Email me at spinov001@gmail.com for a tailored solution.

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