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JavaScript Formatter & Minifier — Prettier Beautifier in Browser

Beautify with Prettier or minify in your browser. Supports modern syntax — async/await, optional chaining, JSX.

Free No signup Client-side Privacy friendly Updated

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How to use

  1. 1 Paste JavaScript code.
  2. 2 Pick Beautify (Prettier) or Minify.
  3. 3 Tune Print width, quote style, semicolons.
  4. 4 Copy or download.

Why use this tool

  • Powered by Prettier with the Babel parser — supports modern JavaScript including JSX.
  • Loaded on demand — page stays fast.
  • Both directions — beautify minified bundles or minify your source.
  • Pure client-side — your code never leaves the browser.

Frequently asked questions

Does this work for TypeScript?

Partial — the Babel parser tolerates simple TS. For full TypeScript support, look for a TypeScript-specific formatter.

Can it beautify minified production bundles?

Yes — but Prettier formats source, not bundles. Variable names stay minified.

How does Minify mode compare to Terser?

Our Minify is conservative — strips comments, collapses whitespace. It does NOT rename identifiers, fold constants, or remove dead code. Use Terser or esbuild for production minification.

What is JavaScript Formatter & Minifier?

A JavaScript Formatter is a tool that beautifies JavaScript with Prettier or minifies it in the browser. The beautify mode re-indents and normalizes code into a consistent, readable style, while the minify mode reduces file size. It supports modern syntax including async/await, optional chaining, and JSX, and processes code entirely client-side on the device.

How JavaScript Formatter & Minifier compares to alternatives

JavaScript Formatter & Minifier versus typical browser and desktop alternatives — features compared at a glance.
Feature Zerethon Tools Typical online tools Desktop apps
Signup required No Sometimes No (IDEs)
Code leaves device No Yes No
Engine Prettier Varies Prettier / ESLint
Beautify + minify Both Sometimes Both
Modern syntax (async, JSX) Yes Sometimes Yes
Free Yes Yes (with ads) Often paid
Summary

JavaScript Formatter & Minifier is a free desarrollo utility by Zerethon Tools. Beautify with Prettier or minify in your browser. Supports modern syntax — async/await, optional chaining, JSX. Runs entirely in the browser — no signup, no upload.

Category
Desarrollo
Pricing
Free
Privacy
Browser-based
Signup
Not required

Privacy

Your data never leaves your browser unless explicitly stated. JavaScript Formatter & Minifier runs entirely client-side — no server upload, no logging, no tracking of your input.

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