HTML, CSS & JavaScript minifier
Shrink HTML, CSS and JavaScript files for faster loading – see exactly how many bytes you save.
- Files never leave your device
- Instant, no waiting queue
- No watermark, no limits
How to use the HTML / CSS / JS Minifier tool
- 1
Pick the language and paste your code.
- 2
Click Minify.
- 3
Copy or download the minified code.
Minify HTML, CSS and JavaScript for faster pages
This code minifier removes whitespace, comments and unnecessary characters from HTML, CSS and JavaScript and shows exactly how many bytes you save. Smaller files load faster and help improve PageSpeed and Core Web Vitals scores.
Minification tips
- Keep the original files for editing – minify only the production copy.
- Combine minification with GZIP or Brotli compression on your server.
- WordPress users can automate minification with a caching plugin.
Format messy JSON with the JSON formatter and shrink images with the image compressor.
Frequently asked questions
Is this tool free?
Yes, it is 100% free with no sign-up, no watermark and no daily limit.
Are my files uploaded to your server?
No. The tool runs entirely in your browser using JavaScript. Your files never leave your device, so the tool is private and works even on slow connections.
What does minifying code do?
It removes spaces, line breaks and comments that browsers do not need, making files smaller.
Does minification break JavaScript?
Proper minification keeps code working. Always test the minified file before deploying.
How much size can I save?
Typically 10–40% depending on how much whitespace and commenting the original has.
Is my code uploaded?
No, minification runs locally in your browser.