JavaScript Minifier
Minify JavaScript code by removing whitespace, comments, and shortening variable names where safe.
Input
Output
Ready — enter input to start
Frequently Asked Questions
What is JavaScript Minifier used for?
JavaScript Minifier reduces code size by removing whitespace, comments, and unnecessary characters while preserving functionality. This speeds up script loading, reduces bandwidth costs, and makes code harder to read for protection in production environments.
How much smaller will my JavaScript get?
Typical reductions range from 30-50% for well-formatted code. Code with many comments, verbose variable names, and extensive whitespace sees the largest improvements. Pair minification with server-side compression for maximum size reduction.
Will the minified code work the same as original?
Yes. The minifier only removes non-essential content (whitespace and comments) that JavaScript engines ignore during parsing. All logic, variables, and function behavior remain identical to the original code.
What does the tool remove during minification?
The tool removes single-line comments (//), multi-line comments (/* */), unnecessary whitespace, and spaces around operators and punctuation. It also joins lines where safe to do so. String content is preserved exactly as-is.
Is my data sent to a server?
No. All minification happens locally in your browser with no external communication. Your JavaScript code, which may contain proprietary algorithms or sensitive logic, stays entirely on your device.
What keyboard shortcuts are available?
Press Ctrl+Enter (or Cmd+Enter on Mac) while in the input field to quickly minify your JavaScript. This allows rapid optimization without reaching for the mouse.