JavaScript Formatter

Beautify JavaScript into clean, readable code

The JavaScript Formatter reformats minified or messy JavaScript into properly indented, evenly spaced code. It lays out blocks, statements and function bodies with consistent indentation so a compacted or hard-to-read script becomes something you can actually follow. It is ideal for making sense of bundled output, inlined snippets or code that lost its formatting on the way into your editor.

How it works

Paste your JavaScript and the tool beautifies it in your browser using JavaScript itself. There is no server involved: the code is processed locally on your machine, which keeps proprietary logic and unreleased features private. The formatted result appears next to your input, ready to copy into your project.

Common situations

• Read a minified or bundled .js file that arrived as one long line.
• Restore consistent indentation to code pasted from a chat or a ticket.
• Prepare a tidy snippet for documentation, a review or a teaching example.
• Trace the structure of an unfamiliar function once it is properly indented.

It fits neatly with the other developer utilities. When you are ready to ship, compress the code with the JavaScript Minifier, tidy the styles that go with it using the CSS Beautifier, or clean up any data literals with the JSON Formatter.

The JavaScript Formatter is free, requires no account and works in every modern browser, including mobile. Because all formatting is client-side, your code never leaves the page and stays private on your device.