Minify and Beautify JavaScript, CSS and HTML

Free Online Code Minifier and Beautifier for JavaScript, CSS and HTML

The DailyOnWeb Minify and Beautify Code tool is a free JavaScript minifier, CSS minifier and HTML minifier in one page. It also works as a JS beautifier, CSS beautifier and HTML beautifier, so you can shrink code for production or unminify it to read it. It needs no registration and runs entirely in your browser.

How to minify JavaScript, CSS or HTML

1. Choose the language: JavaScript, CSS or HTML.
2. Select Minify and paste your code into the input box.
3. Click the button. Comments, extra spaces and line breaks are removed.
4. Check the bytes saved, then copy the result or download it as a file.

How to beautify or unminify code

Paste compressed or one-line code, switch to Beautify and run the tool. It adds line breaks and clean indentation so a minified script or stylesheet becomes easy to read and debug. This is useful when you only have the production file, or when you copy code from a website and need to understand it.

Why minify your code?

Every kilobyte a visitor downloads slows the page. Minifying reduces file size, which lowers load time, improves Core Web Vitals and helps search ranking, especially on mobile connections. Pair it with image compression to remove the biggest files on most pages, and serve text files with gzip or Brotli for the smallest possible download.

A code minifier that respects your privacy

Many online minifiers send your code to a server. This tool does all the work inside your browser, so private, client or unreleased code stays on your own device and nothing is stored on our side.

Tips for best results

• Keep the original, readable file. Minified code is hard to edit, so only deploy the minified copy.
• Remove unused CSS and dead JavaScript before minifying for the best saving.
• Test your page after replacing files, and clear caches so visitors get the new version.
• Use a name like app.min.js or style.min.css so it is clear which file is minified.

More free developer tools

Working with other formats? Use the JSON formatter and validator to pretty print or minify JSON, the XML formatter to indent XML, or the SQL formatter to clean up queries. Need to test a pattern in your script? Try the regex tester. To embed data or safe URLs in your code, see Base64 encode and URL encode. You can also check the size of your text with the word counter and character counter, or change identifiers with the case converter.

Explore all the free utility tools on DailyOnWeb for coding, text, generators and everyday tasks.