Developer tool

JavaScript Formatter

Format, beautify, and minify JavaScript with indentation, wrap, and brace-style controls. Everything runs locally in your browser.

Lines

Current editor

Functions

function and =>

Characters

234

Including spaces

Private by defaultBeautify & minifyBrace styles

JavaScript workspace

Paste or edit your script

What & how guide

Ready to format.

GuideFormat JavaScript in three steps3 steps

Paste your JavaScript

Drop in a script, JSON-like object, or load the sample. Your code stays in this browser tab.

Choose formatting rules

Pick indentation, line-wrap width, and brace style before you beautify.

Format or minify

Create readable JavaScript for reviews, or minify it for a compact snippet, then copy the result.

More toolsRelated tools

JavaScript Formatter Guide

Learn what JavaScript formatting is and how to use this tool step by step.

HTML Formatter

Beautify or minify HTML markup with indentation and wrap controls.

CSS Formatter

Format stylesheets with indentation and wrap controls.

JSON Viewer

Inspect and format JSON documents in a dedicated workspace.

FAQFrequently asked questions

Does the JavaScript formatter upload my code?

No. Formatting and minification run locally in your browser, so the script is not sent to an MTKits server.

What does formatting change?

Beautifying rewrites whitespace, indentation, and brace placement so functions, objects, and control flow are easier to read. It does not rename variables or change program behavior.

What does minifying remove?

Minifying strips comments and extra whitespace while leaving strings, template literals, and regular expressions intact.

Can I format JSON with this tool?

Yes for object and array literals. For richer JSON inspection, filtering, and tree views, use JSON Viewer.

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