Keep source files
Never edit minified code. Change the original and minify again.
JavaScript Minifier
Make JavaScript files smaller by stripping comments, indentation and unnecessary spaces. The minifier understands strings, regular expressions and template literals, and keeps line breaks wherever removing them could change how your code runs.
- 100% free
- No sign-up
- Runs in your browser
How to use
How to use the JavaScript Minifier
- Paste your JavaScript.
- Click Minify.
- Check the size saving.
- Copy or download the minified file, and keep the original for editing.
Private by design. Your code and data are processed in your browser. Nothing is uploaded, logged or stored, so it is safe for API responses, configs and other internal data.
About this tool
Safe minification vs full compression
This tool performs safe minification: it removes comments and whitespace but never renames variables or rewrites logic. JavaScript can insert semicolons automatically at line breaks, so a careless minifier that joins lines can change what code does. This one keeps a line break wherever that could happen, and licence comments starting with /*! are preserved.
Build tools such as Terser or esbuild go further by shortening variable names and removing unused code, and they are the right choice for large applications. For snippets, small scripts and quick jobs, safe minification gives a solid saving with no risk.
Good to know
Minification tips
Use source maps in apps
Build tools create source maps so errors still point to readable code.
Combine with compression
Gzip or Brotli on your server shrinks files much further.
Test the result
Run your page after minifying to confirm everything works.
FAQ
JavaScript Minifier FAQs
Will minification change how my code works?
No. Only comments and safe whitespace are removed; variable names and logic stay the same.
Does it support modern JavaScript?
Yes: arrow functions, template literals, optional chaining, classes and modules.
Why are some line breaks kept?
Where JavaScript's automatic semicolon insertion could apply, keeping the line break preserves the original behaviour.
Is my code uploaded?
No. It is processed in your browser.
Need extra development capacity?
Hire dedicated developers from iCreativez who work as part of your team.