Input Code
Minified Output
Minify CSS & JavaScript instantly
Minify CSS and JavaScript code instantly in your browser.
Compress code by removing whitespace, comments, and unnecessary characters.
Code never leaves your browser. All processing is local.
See exactly how much space you save after minification.
Support for both CSS and JavaScript minification.
No signup, no limits. Minify as much code as you need.
Minification is the process of removing unnecessary characters from code without changing its functionality. This includes whitespace, comments, and shortening variable names to reduce file size.
Minified code is source code that has been compressed by removing all unnecessary characters. The code still works identically but takes up less space, making websites load faster.
Minified CSS and JS are stylesheet and script files that have been processed to remove whitespace, line breaks, and comments. The result is a single-line file that's smaller but functionally identical.
To minify JavaScript means to compress the code by removing spaces, line breaks, comments, and sometimes shortening variable names. This reduces file size without changing how the code executes.
Minified JavaScript files (often named .min.js) are compressed versions of regular JS files. They're optimized for production use, loading faster due to their smaller size while maintaining full functionality.
Minifying JS reduces file size by 20-80%, which means faster page loads, less bandwidth usage, and better user experience. It's a standard best practice for production websites.
Minified code loads faster because smaller files transfer quicker over the network. This improves website performance, reduces bandwidth usage, and can improve SEO rankings.
Yes! Minifying CSS is recommended for all production websites. It reduces file size, speeds up page rendering, and improves Core Web Vitals scores without any downside.
No, minification only removes unnecessary characters. Your code will function exactly the same way, just with a smaller file size.
Yes! Minifying JavaScript improves performance by reducing file size, which means faster downloads and quicker page loads. Combined with other optimizations, it can significantly boost your site speed.
Minified JS downloads faster due to smaller file size, but execution speed is the same. The performance gain comes from reduced network transfer time, not faster code execution.
Use our free online minifier: paste your code, select CSS or JavaScript mode, and click "Minify". You can also use build tools like Webpack, Gulp, or command-line tools for automated minification.
Select "CSS" mode, paste your CSS code in the input box, and click "Minify". Your minified CSS will appear in the output box, ready to copy.
To minimize CSS, paste your stylesheet into our tool and click Minify. We'll remove all unnecessary whitespace, comments, and optimize selectors to create the smallest possible file.
Select "JavaScript" mode, paste your JS code in the input box, and click "Minify". The compressed JavaScript will appear instantly.
Open your .js file, copy the contents, paste into our minifier, select JavaScript mode, and click Minify. Copy the output and save it as yourfile.min.js for production use.
To unminify (beautify) CSS, use a CSS formatter/beautifier tool. These tools add proper indentation and line breaks to make minified code readable again. Note: comments removed during minification cannot be restored.
A CSS minifier is a tool that compresses CSS code by removing unnecessary characters like whitespace, comments, and redundant semicolons. Our online CSS minifier does this instantly in your browser.
A JavaScript minifier is a tool that compresses JS code to reduce file size. It removes whitespace, shortens variable names, and eliminates dead code while preserving functionality.
Since processing happens in your browser, you can minify files of any reasonable size. Very large files may take a moment to process.
Yes! Your code never leaves your browser. All minification happens locally on your device - we never see or store your code.
Yes! Our code minifier is 100% free with no limits. Minify as much CSS and JavaScript as you need.