JavaScript Beautifier
Beautify messy JavaScript into readable, properly indented code, or minify it to reduce file size.
JavaScript Input
Output
Output will appear here...
How Does It Work?
The JavaScript Beautifier reformats minified or messy JS code into a readable, properly indented structure. It tracks brace depth to indent code blocks, keeps opening braces on the same line, and adds newlines after semicolons and closing braces. The Minify mode strips comments and collapses whitespace to produce the smallest possible output.
Example
Input: function greet(name){console.log("Hello, "+name);return true;}
Beautified (2 spaces): The function opens with proper indentation, the console.log sits one level deep, and the closing brace aligns with the function keyword.
Common Use Cases
- Reading minified JavaScript libraries or bundled scripts during debugging.
- Cleaning up auto-generated or compressed code before code review.
- Preparing JS for pasting into documentation or Stack Overflow examples.
- Reducing file size of scripts before deployment with the minify option.
FAQs
Is this the same as a JS formatter or prettifier?
Yes — beautify, format, and prettify all refer to the same thing: re-indenting JavaScript code for readability.
Will beautifying change how my code runs?
No. Beautifying only adds whitespace and newlines for readability. Minifying removes comments and extra whitespace but preserves the code logic. Neither alters the actual execution behavior.
Does it handle template literals and regular expressions?
The beautifier respects string boundaries (single, double, and backtick strings) so content inside strings is not affected by formatting rules. For complex template literals with embedded expressions, a full AST-based tool is recommended.