✨ Developer

JavaScript Beautifier — Free 2026

Format minified JavaScript with proper indentation, or minify readable code for production.

JavaScript Input

Output

—

Input Size

—

Output Size

How It Works

Paste your JavaScript
Click Beautify or Minify
Copy the output

JavaScript Formatting Made Easy

Minified JavaScript is great for production performance but terrible for debugging and code review. This free JavaScript beautifier takes compressed code and restores it to a readable format with proper indentation, newlines after braces and semicolons, and consistent spacing. The process is entirely reversible — you can minify the code back with one click.

What the Beautifier Does

The formatter tracks opening and closing braces, brackets, and parentheses to determine indentation depth. It adds a newline after each opening brace and semicolon, and decreases indentation before each closing brace. String literals (single quotes, double quotes, and template literals) are preserved exactly as-is. Comments are kept in place. For CSS formatting, check our CSS minifier.

Minification

The Minify button removes all unnecessary whitespace, newlines, and comments to produce the smallest possible output. This is useful for preparing code for production deployment or for comparing file sizes. Note that for production use, a proper build tool like Terser is recommended as it also performs dead code elimination and variable mangling. For SQL formatting, try our SQL formatter.

Privacy and Security

Your JavaScript code never leaves your browser. All processing happens locally using vanilla JavaScript, so it is safe to use with proprietary source code, API keys, or any sensitive code. The tool works offline once the page has loaded.

Frequently Asked Questions

How does the JavaScript beautifier work?

The beautifier scans your JavaScript character by character, tracking braces, brackets, parentheses, string literals, and semicolons. It adds newlines after opening braces and semicolons, increases indentation inside blocks, and ensures consistent spacing. String literals and template literals are preserved without modification.

Can this tool unminify production JavaScript?

Yes, the beautifier can format minified JavaScript into readable code with proper indentation. However, if variable names were mangled during minification, they will remain shortened. The tool restores structure but cannot recover original variable names.

Does the beautifier modify my code logic?

No. The beautifier only adds or removes whitespace and newlines. It never changes variable names, operators, or the logic of your code. The formatted output is functionally identical to the input.

Is my JavaScript code sent to a server?

No. All formatting happens locally in your browser. Your code never leaves your device, so it is safe to use with proprietary or sensitive source code.