What is code minification?

Minification removes unnecessary characters — whitespace, comments, and newlines — from source code without changing its behaviour, resulting in smaller files that load faster.

Will minified code still work correctly?

Yes. Minification only removes whitespace and comments without renaming variables or restructuring logic. The output is functionally identical to the original.

How much file size can I save by minifying?

Typical savings range from 20–60% depending on how much whitespace and comments your original file contains. The tool shows an exact percentage after minifying.

Is my source code sent to any server?

No. All processing happens entirely in your browser using JavaScript. Your code is never transmitted anywhere and stays on your device from start to finish.

Code Minifier

Minify JavaScript, CSS, and HTML instantly in your browser. Remove whitespace and comments to reduce file sizes — no upload, no account required.

Input — paste your JavaScript code

0 characters

Instant & Free

Minification runs locally in your browser — no server round-trips, no waiting.

100% Private

Your code never leaves your device. Zero uploads, zero tracking.

JS, CSS & HTML

Three languages, one tool. Switch tabs to minify any web asset.

How to Minify Your Code

Four simple steps to smaller files

Choose a language

Select the JavaScript, CSS, or HTML tab.

Paste your code

Paste your source code into the input area.

Click Minify

Hit the Minify button and see instant results.

Copy or download

Copy the output or download the .min file.

Frequently Asked Questions