Best Code Formatting Tools 2026

TL;DR

Prettier for maximum ecosystem compatibility; Biome for speed and combined lint+format. Prettier (~45M weekly downloads) is the established standard — every editor supports it, every config works. Biome (~1.5M downloads, growing fast) is 10-35x faster, written in Rust, and combines formatting + linting in one tool. dprint (~200K) is the fastest formatter and most configurable but has the smallest ecosystem. For new projects in 2026, Biome is compelling; for existing projects, Prettier is the safe choice.

Key Takeaways

• Prettier: ~45M weekly downloads — universal adoption, 2-language support, every editor plugin
• Biome: ~1.5M downloads — 10-35x faster, Rust-based, lint + format combined
• dprint: ~200K downloads — fastest, WASM plugins, most configurable
• Biome — compatible with most Prettier configs via biome migrate prettier
• ESLint + Prettier — still common combo but Biome replaces both

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Why Code Formatting Matters

Code formatting sounds trivial — it's just whitespace and quotes, right? In practice, unformatted code creates real friction on teams. Every code review gets polluted with style comments ("semicolons here", "wrong quote style", "trailing comma missing"). Merge conflicts multiply because developers format the same lines differently. The cognitive overhead of reading inconsistently-formatted code adds up over months.

Automated formatters solve this entirely. When a formatter runs on every save and every pre-commit, style becomes a non-issue. Reviews focus on logic. Diffs show only meaningful changes. New team members don't need to learn an informal style guide — the formatter enforces it automatically.

The main question in 2026 is which formatter to choose, not whether to use one.

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Prettier (The Standard)

// .prettierrc — config
{
  "semi": true,
  "singleQuote": true,
  "printWidth": 100,
  "tabWidth": 2,
  "useTabs": false,
  "trailingComma": "all",
  "bracketSpacing": true,
  "arrowParens": "always",
  "endOfLine": "lf",
  "overrides": [
    {
      "files": "*.json",
      "options": { "printWidth": 80 }
    }
  ]
}

# .prettierignore
node_modules
dist
.next
.cache
coverage
*.min.js

# Prettier CLI commands
prettier --write "src/**/*.{ts,tsx,js,jsx,json,css,md}"
prettier --check "src/**/*.{ts,tsx}"     # CI check (fails if not formatted)
prettier --write .                        # Format everything

# With package.json scripts
# "format": "prettier --write .",
# "format:check": "prettier --check ."

// package.json — Husky + lint-staged integration
{
  "lint-staged": {
    "*.{ts,tsx,js,jsx}": ["eslint --fix", "prettier --write"],
    "*.{json,css,md}": ["prettier --write"]
  }
}

Prettier formats over 20 languages including JavaScript, TypeScript, CSS, Markdown, HTML, GraphQL, and YAML. This breadth is why it remains dominant — one tool handles your entire codebase.

---

Biome (Speed + Lint)

// biome.json — combines ESLint + Prettier replacement
{
  "$schema": "https://biomejs.dev/schemas/1.9.0/schema.json",
  "organizeImports": { "enabled": true },
  "formatter": {
    "enabled": true,
    "indentStyle": "space",
    "indentWidth": 2,
    "lineWidth": 100,
    "lineEnding": "lf"
  },
  "javascript": {
    "formatter": {
      "quoteStyle": "single",
      "trailingCommas": "all",
      "semicolons": "always",
      "arrowParentheses": "always"
    }
  },
  "linter": {
    "enabled": true,
    "rules": {
      "recommended": true,
      "correctness": {
        "noUnusedVariables": "error"
      },
      "style": {
        "noNonNullAssertion": "warn"
      },
      "suspicious": {
        "noExplicitAny": "warn"
      }
    }
  },
  "files": {
    "ignore": ["node_modules", "dist", ".next", "coverage"]
  }
}

# Biome commands
biome format --write .            # Format all files
biome check --write .             # Lint + format + organize imports
biome lint .                      # Lint only
biome ci .                        # CI check (no writes, fails on issues)

# Migrate from Prettier
biome migrate prettier --write    # Import .prettierrc settings

# Speed comparison (same codebase):
# Prettier: 2.3s
# Biome:    0.07s  (33x faster!)

# VS Code setup — install Biome extension
# .vscode/settings.json
{
  "editor.defaultFormatter": "biomejs.biome",
  "editor.formatOnSave": true,
  "[javascript]": { "editor.defaultFormatter": "biomejs.biome" },
  "[typescript]": { "editor.defaultFormatter": "biomejs.biome" },
  "[typescriptreact]": { "editor.defaultFormatter": "biomejs.biome" }
}

Biome's key advantage is consolidation: instead of installing and configuring ESLint, Prettier, and their integration (eslint-config-prettier to disable ESLint rules that conflict with Prettier), you install one tool. Biome handles formatting and linting in a single pass with a single configuration file.

---

dprint (Fastest)

// dprint.json — plugin-based config
{
  "incremental": true,
  "typescript": {
    "lineWidth": 100,
    "indentWidth": 2,
    "useTabs": false,
    "singleQuotes": true,
    "quoteStyle": "preferSingle",
    "trailingCommas": "onlyMultiLine",
    "semicolons": "always"
  },
  "json": {
    "lineWidth": 80,
    "indentWidth": 2
  },
  "markdown": {
    "lineWidth": 80
  },
  "plugins": [
    "https://plugins.dprint.dev/typescript-0.93.0.wasm",
    "https://plugins.dprint.dev/json-0.19.4.wasm",
    "https://plugins.dprint.dev/markdown-0.17.8.wasm",
    "https://plugins.dprint.dev/toml-0.6.2.wasm"
  ]
}

# dprint commands
dprint fmt                 # Format all files
dprint check               # Check without writing (CI)
dprint fmt --diff          # Show what would change

# Speed: fastest formatter available
# Prettier: 2.3s | Biome: 0.07s | dprint: 0.04s

dprint's incremental mode is its most distinctive feature: it remembers which files it's formatted and only re-formats files that have changed since the last run. In a large monorepo, this means formatting runs in milliseconds even for codebases with thousands of files.

---

Speed Benchmark

Tool	Format 1000 files	Language Support	Lint	Type-aware
Prettier	2-5s	20+ languages	❌	❌
Biome	0.05-0.1s	JS/TS/JSON/CSS	✅	❌
dprint	0.03-0.08s	Via plugins	❌	❌
ESLint + Prettier	4-15s	JS/TS	✅	✅ optional

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Pre-Commit Hook Setup

All three formatters integrate cleanly with Husky + lint-staged for pre-commit enforcement:

# Install Husky + lint-staged
npm install --save-dev husky lint-staged
npx husky install
npx husky add .husky/pre-commit "npx lint-staged"

// package.json — lint-staged config

// With Prettier:
{
  "lint-staged": {
    "*.{ts,tsx,js,jsx}": ["prettier --write", "eslint --fix"],
    "*.{json,css,md,yaml}": ["prettier --write"]
  }
}

// With Biome:
{
  "lint-staged": {
    "*.{ts,tsx,js,jsx,json,css}": ["biome check --apply --no-errors-on-unmatched"]
  }
}

// With dprint:
{
  "lint-staged": {
    "*.{ts,tsx,js,jsx,json,md}": ["dprint fmt"]
  }
}

---

CI Integration

# GitHub Actions — Prettier check
- name: Check formatting
  run: npx prettier --check .

# GitHub Actions — Biome check (faster)
- name: Biome check
  run: npx @biomejs/biome ci .
  # biome ci exits non-zero if any formatting or lint issues found

# GitHub Actions — dprint check
- name: Check formatting
  run: npx dprint check

Biome's ci command is the cleanest CI integration: it runs both linting and formatting in a single command, outputs structured error messages, and exits with a non-zero code on any issue. For teams using GitHub Actions, this reduces CI configuration from two separate steps (lint step + format step) to one.

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Team Adoption Considerations

Prettier is the safest choice when onboarding teammates who may have different editors or setups. The VS Code extension is installed by 30M+ developers; JetBrains, Neovim, Emacs, Helix all have mature Prettier plugins. You can be confident that every developer on the team can get format-on-save working regardless of their editor.

Biome is newer and the editor extension ecosystem is still catching up. VS Code and IntelliJ have official extensions. Neovim has an LSP plugin. The coverage isn't as complete as Prettier's, which can create friction when a team member uses an unusual editor.

dprint has the smallest editor extension ecosystem. For teams where all developers use VS Code or JetBrains, this isn't an issue. For more diverse editor setups, dprint may require some developers to run formatting manually.

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When to Choose

Scenario	Pick
Established project, max compatibility	Prettier
New project, want speed + lint	Biome
Monorepo with huge file count	Biome or dprint
Need type-aware linting	ESLint (or Biome + ESLint for type checks)
Non-JS files (Go, Rust, Python)	Prettier (for JS) + lang-specific tools
Migrating from Prettier	Biome (biome migrate prettier)
CI speed is critical	Biome or dprint

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Compare formatter package health on PkgPulse. Also see our Vitest vs Jest comparison for the testing side of your quality toolchain and Biome vs ESLint + Prettier for a deeper linting comparison.