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Prettier vs Biome (2026): Best Code Formatter for Modern JavaScript?

Code formatting shouldn't be a debate. But in 2026, there's a real choice: Prettier (the industry standard) or Biome (the faster, all-in-one challenger). Here's how they compare — and whether Biome is ready to replace Prettier.

Quick Comparison

Prettier	Biome
Language	JavaScript
Speed	Fast (but slower on large repos)
Formatting	Opinionated, minimal options
Linting	No (use ESLint separately)
Languages supported	JS, TS, JSX, JSON, CSS, HTML, MD, YAML, GraphQL, etc.
Editor integration	Every editor
Configuration	.prettierrc

Prettier — The Safe, Universal Default

Prettier ended the "tabs vs spaces" debate by being aggressively opinionated. It works with every editor, every CI pipeline, and every language you throw at it. The ecosystem is so dominant that "prettier" is synonymous with "auto-formatting."

Best for: Any project where compatibility matters more than speed. Teams that format many different file types (HTML, YAML, Markdown). Projects that need Prettier plugins.

Weak spot: Slower on large monorepos. Only formats (doesn't lint). Node.js-based (slower than Rust).

Biome — The Rust-Powered All-in-One

Biome (formerly Rome) is built in Rust and is 10-25x faster than Prettier. The bigger value proposition: it handles both formatting AND linting in one binary, replacing Prettier + ESLint for standard rules. For new projects, this means one dependency instead of two, one config file, and dramatically faster CI.

Best for: New projects (fewer dependencies), large monorepos where Prettier is slow, teams that want formatting + linting in one tool, Rust-curious developers.

Weak spot: Not 100% Prettier-compatible (~97%). Fewer editor integrations. Supports fewer languages (no HTML, YAML, or Markdown yet). Smaller ecosystem — if your CI/tooling assumes Prettier, you'll need to adapt.

Migration: Prettier → Biome

Step	What to Do
1. Check compatibility	Run biome migrate prettier to convert your .prettierrc
2. Compare output	Run Biome and Prettier side by side. Check for diffs.
3. Add linting	Enable Biome lint rules. Disable matching ESLint rules.
4. Update CI	Replace prettier --check with biome check
5. Update editor	Install Biome extension, disable Prettier for the project

Decision Matrix

Scenario	Best Formatter
New project, all JavaScript/TypeScript	Biome
Large monorepo (slow Prettier)	Biome
Need HTML, YAML, MD formatting	Prettier
Maximum editor/CI compatibility	Prettier
Want formatting + linting in one tool	Biome

Bottom line: Biome is ready for new JavaScript/TypeScript projects — the speed difference is real, and replacing two tools with one is a win. Prettier remains the safe universal default, especially for mixed-language projects. The 97% compatibility means migration costs are low. See also: Package Manager Comparison and CI/CD Tools.

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