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JavaScript Formatter

Format JavaScript with consistent indentation (lightweight formatter).

Step 1

Paste input

Add your content in the input editor.

Step 2

Run tool

Process instantly with in-browser logic.

Step 3

Copy output

Export clean results to your project.

All-time runs

Live traffic

30-day success

Reliable processing

Average speed

Fast avg

⚡ Runs instantly in your browser. No files are uploaded.

Input

Output

Ready.

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About JavaScript Formatter

Minified JavaScript from a build tool collapses all logic into continuous lines and shortens variable names, making it unreadable for debugging, security review, or understanding what a third-party script does. This JavaScript formatter parses the minified code and re-prints it w...

→ Beautify a minified third-party library to trace the source of a runtime error without a source map. → Format inline JavaScript extracted from a browser session for a security review. → Expand a minified script to add console.log statements for temporary debugging. → Read a third-party analytics or widget script to understand what it collects before deploying it.

Related guides and workflows

Guide

How to Use JavaScript Formatter Online

Learn how to use JavaScript Formatter online. Format JavaScript with consistent indentation (lightweight formatter).

📦 Supported formats 1 file types

JavaScript (.js)

❓ Frequently asked questions 3 answers

No. The formatter only changes whitespace and indentation. Variable names, values, and logic are unchanged.

The tool works with standard JavaScript. TypeScript-specific syntax may not be fully supported.

Yes, this is the primary use case — deobfuscating minified third-party libraries for debugging.