Javascript Minifier
Free online Javascript Minifier tool.
About Javascript Minifier
Free online Javascript Minifier tool.
JavaScript Minifier shrinks your scripts by removing comments, shortening variable names where it is safe, collapsing whitespace and converting repeated patterns to shorter forms, all without changing what the code does. Paste a file or a snippet, press minify, and the tool reports the original size, the compressed size, the bytes saved and the percentage gained, with the output ready to copy beside a list of the changes. Advanced toggles let you preserve license comments, rename local variables or leave function names intact for debugging. Teams use it to cut payload weight on landing pages, agencies to optimize client bundles, and students to see how bundlers prepare code for production. JavaScript Minifier is free, runs entirely in your browser and never sends your code to a server.
How to Use Javascript Minifier
- Paste your code, markup or configuration into the editor.
- Choose the output format or options offered.
- The formatted result updates live.
- Copy or download the finished code.
Key Features
- Clean, consistently formatted output ready to paste.
- Supports the common formats used in web development.
- One-click copy and download — no build step required.
Frequently Asked Questions
Is it safe to use the JavaScript Minifier output in production?
Yes, provided you keep the default safety options on. The minifier avoids renaming global symbols and anything reachable through reflection, so callbacks and library APIs keep working. Use the included change list to review every edit, test the result in your browser console, and keep the unminified source in version control so you can debug comfortably later.
Is Javascript Minifier free to use?
Yes. Javascript Minifier is completely free with unlimited use — no account, download or payment required.
Is my data uploaded to a server?
No. Javascript Minifier runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.
Does Javascript Minifier work on mobile?
Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.