JavaScript Minifier
Minify JavaScript by removing comments, whitespace, and unnecessary characters. All processing happens in your browser.
Remove Comments
Strips single-line (//) and multi-line (/* */) comments from your JavaScript code.
Collapse Whitespace
Removes unnecessary spaces, tabs, and newlines to produce compact single-line output.
Compression Ratio
See the original and minified file sizes with percentage reduction at a glance.
How to Use the JavaScript Minifier
- 1.Paste your JavaScript code into the Input panel on the left.
- 2.Click Minify to compress the code instantly.
- 3.Review the compression ratio badge showing original vs. minified size.
- 4.Click Copy to copy the minified output to your clipboard.
Frequently Asked Questions
What does JavaScript minification do?
JavaScript minification removes comments, whitespace, newlines, and other unnecessary characters from your source code without changing functionality. This reduces file size and improves page load times.
Is minification the same as obfuscation?
No. Minification only removes unnecessary characters to reduce size. Obfuscation deliberately makes code hard to read by renaming variables and restructuring logic. This tool focuses on minification for performance.
Will minification break my code?
Basic minification (removing comments and whitespace) is safe and will not change behavior. However, complex transformations like variable renaming can sometimes cause issues. Always test minified code before deploying.
Is my code sent to a server?
No. All JavaScript minification happens entirely in your browser using client-side JavaScript. Your code never leaves your device and no data is transmitted to any server.