Z

JavaScript Formatter & Minifier

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

Free No signup Client-side Privacy friendly

Loading Prettier…

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.

Summary

JavaScript Formatter & Minifier is a free developer 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
Developer
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.

Related tools

JSON Formatter

Format, validate, and minify JSON online. Free, no signup — your data never leaves your browser.

Open tool

SQL Formatter

Format SQL queries online — beautify MySQL, PostgreSQL, SQLite, SQL Server, Oracle, and BigQuery.

Open tool

UUID Generator

Generate UUIDs online — v1, v4, v7, and Nil. Bulk generation up to 10,000. Free, no signup.

Open tool

Password Generator

Generate strong, cryptographically random passwords. Configurable length and character sets — runs in your browser.

Open tool

Build, share, and grow on Zerethon Social

Free signup. Earn points, collect achievements, and connect with creators worldwide.

Sign up free