JS Minifier

Reduce the size of your JavaScript files for faster loading and execution in the browser.

Our JS Minifier (JavaScript Minifier) aggressively compresses your script files by removing unnecessary characters and shortening variable names. Essential for optimizing front-end performance and improving your site's Lighthouse scores. Minify your JavaScript now!

JavaScript minification reduces file size by removing whitespace, comments, and optimizing code. Example: function hello() { console.log("Hi"); } becomes function hello(){console.log("Hi")}

Please enter some JavaScript code to minify. The input field cannot be empty.

Enter your JS Code Here

Note: Advanced editor failed to load. Using fallback text editor.

Minification Options

Compress - Remove whitespace and optimize code structure Mangle - Shorten variable names (e.g., myVariable → a) Source Map - Generate source map for debugging

Minified JavaScript Output

Original

bytes • lines

Minified

bytes • lines

Saved % ( bytes)

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How to Use

Step-by-step guide 3 steps

1 Enter JavaScript: Paste your raw, readable JavaScript code (containing comments, long variable names).
2 Minify: Click "Minify JS".
3 Copy Minified Code: The output is highly compressed, single-line JavaScript, often with shortened variable names, ready for production optimization.

FAQ

Common questions 3 questions

What is the benefit of JS minification?

JS minification significantly reduces the file size, making script files download faster. This improves the browser's ability to process user interactions and directly enhances the First Input Delay (FID) metric.

What is the difference between minifying and obfuscating?

Minifying focuses on reducing file size (performance). Obfuscating scrambles code to make it intentionally unreadable (security/IP protection).

Can minified JS still be debugged?

Minified JS is hard to read. Developers rely on Source Maps (separate files not created by this tool) to map minified code back to the original source code for easier debugging.

Use Cases & Examples

Real-world applications 3 examples

Core Web Vitals

Example Keyword: minify javascript for speed
Reduce the size of large script files to improve loading speed and First Input Delay (FID) score.

Production Deployment

Example Keyword: compress js code for web
Prepare final JavaScript files for deployment, ensuring the smallest possible file size is served to users.

Reducing Parsing Time

Example Keyword: optimize js file size
Lower the size of a script to reduce the amount of time the browser spends downloading and parsing it.