Is my JavaScript code uploaded to a server?

No. Minification runs entirely in your browser. Your code is not uploaded or stored on our servers.

Does minifying JavaScript change how my code runs?

Minification removes unnecessary characters and may rename variables and functions when mangling is enabled. The goal is to keep the same behavior, but you should test your minified build—especially if your code relies on specific global names or reflection.

What’s the difference between compress and mangle?

Compression applies code optimizations like removing unreachable code and simplifying expressions. Mangling renames variables and functions to shorter names. Enabling both usually produces the smallest output.

Can I keep license comments?

Yes. Enable the option to keep license comments (for example /*! ... */ or comments containing @license/@preserve).

JavaScript Minifier Online

Minify JS to reduce file size and speed up page loads. All processing happens in your browser — your code never leaves your device.

JavaScript input

Minification options

Compress (recommended)

Mangle names (smaller output)

Drop console.* (when compressing)

Keep license comments (/*! ... */)

Why Minify JavaScript?

100% Client-Side

Your JavaScript is processed locally in your browser. Nothing is uploaded or stored.

Faster Load Times

Smaller scripts download faster and can improve performance for real users.

Configurable Output

Enable compression, name mangling, and optional console removal to fit your use case.

Copy or Download

Copy the minified result to your clipboard or download a ready-to-use .min.js file.

Works Anywhere

Use on desktop, tablet, or mobile — no installation required.

Free Forever

No sign-up, no limits. Minify as often as you need.

How to Minify JavaScript

Three simple steps

1
Paste or upload your code
Paste JavaScript into the editor or upload a .js file to load it instantly.
2
Adjust options (optional)
Toggle compression, name mangling, console removal, and license comment preservation.
3
Minify and export
Click Minify JavaScript, then copy the output or download it as a .min.js file.

JavaScript Minifier FAQ

Is this JavaScript minifier free to use?

Yes. The tool is free with no sign-up and no usage limits.

Is my code private?

Yes. All minification runs in your browser. Your code is not uploaded or saved.

Should I enable name mangling?

Mangling usually makes output smaller. If your code exposes specific global names that other scripts rely on, keep mangling off or test carefully.

Why would I drop console.*?

Dropping console statements can reduce size and avoid leaking logs in production. Keep it off for debugging builds.