JavaScript Minifier — Compress JS Code Online for Free [2026]
Free JavaScript minifier. Remove whitespace, comments, and shorten code to reduce JS file size. See compression stats. Works offline in your browser — no data uploaded.
What is JavaScript Minifier?
How to Use JavaScript Minifier
1. Paste your JavaScript code into the input area. 2. Choose minification options: remove comments, collapse whitespace, remove line breaks. 3. Click "Minify" to compress the JavaScript. 4. View the minified output and compression statistics (original size, minified size, savings percentage). 5. Copy the result or download it as a .js file.
How JavaScript Minifier Works
Common Use Cases
- Compressing JavaScript for production deployment
- Reducing bundle size to improve page load speed
- Minifying inline scripts for HTML email templates
- Quick minification without setting up a build tool
- Comparing original and minified code size for optimization decisions
Frequently Asked Questions
What is JavaScript minification?▼
JavaScript minification removes unnecessary characters like whitespace, comments, and line breaks from code without changing its functionality. The result is a smaller file that downloads and parses faster in the browser.
Is this the same as uglification?▼
Minification focuses on removing whitespace and comments. Full uglification also renames variables to shorter names and applies code transformations. This tool performs minification (whitespace and comment removal) which is safe and preserves all variable names.
Will minification break my code?▼
The minifier preserves all code logic and only removes characters that do not affect execution. String literals, template literals, and regular expressions are preserved exactly as-is. Always test minified code to be safe.
Is my code sent to a server?▼
No. All minification happens entirely in your browser using JavaScript. Your code never leaves your machine.