JavaScript Minifier & Beautifier
Minify JavaScript to reduce file size or beautify it for readability. Includes configurable indentation, size comparison, and instant copy — all client-side.
Input JavaScript
Beautified Output
Output will appear here...How to Use the JavaScript Minifier & Beautifier
- 1Paste your JavaScript code into the input textarea on the left
- 2Choose Beautify mode to format JS with proper indentation, or Minify mode to compress it
- 3When beautifying, select your preferred indent size (2 or 4 spaces)
- 4View the result in the output panel on the right
- 5Check the stats bar for original size, output size, and savings percentage
- 6Click "Copy" to copy the result to your clipboard
Frequently Asked Questions
What does JavaScript minification do?
JavaScript minification removes all unnecessary characters — whitespace, line breaks, and comments — without changing functionality. This reduces file size, leading to faster page load times and lower bandwidth usage in production environments.
What does the JavaScript beautifier do?
The beautifier reformats compressed or messy JavaScript into a clean, readable format with consistent indentation, one statement per line, and proper spacing around operators and braces. You can choose between 2-space or 4-space indentation.
Is my JavaScript code secure when using this tool?
Yes. All processing happens entirely in your browser using client-side JavaScript. Your code is never sent to any server, ensuring complete privacy for proprietary source code.
Does this tool handle all JavaScript syntax correctly?
The tool uses a regex/string-based approach that handles the vast majority of JavaScript code well, including strings, template literals, regex literals, and comments. However, it is not a full parser, so extremely unusual or edge-case syntax may not be handled perfectly.
How much file size can I save by minifying JavaScript?
Savings vary depending on the original formatting and amount of comments, but typical JavaScript files see a 30-60% reduction in size after minification. Files with extensive comments and whitespace may see even greater savings.
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