HTML/CSS/JS Minifier

Developer Tools

Minify HTML, CSS, and JavaScript to reduce file size for production.

Input

What is HTML/CSS/JS Minifier?

An HTML/CSS/JS Minifier strips comments, excess whitespace, and redundant characters from HTML, CSS, and JavaScript source code to reduce file size. Smaller files load faster, improving page speed and Core Web Vitals scores.

How to use HTML/CSS/JS Minifier

Select the language

Click the HTML, CSS, or JavaScript tab depending on the type of code you want to minify.

Paste your code

Paste your source code into the input area. The tool accepts any amount of code.

View the results

The Minified output and Beautified output both appear immediately. The stats panel shows original size, compressed size, and percentage saved.

Copy or download

Click Copy next to the minified version to copy it to clipboard, or Download to save as a file.

Who uses HTML/CSS/JS Minifier?

Production build preparation

Frontend developers

Minify CSS and JS files before deploying to production to reduce payload size and improve Time to First Byte (TTFB).

Email template optimisation

Email marketers

Compress HTML email templates to keep them under inbox size limits and ensure fast rendering across email clients.

Performance auditing

Web performance engineers

Compare original and minified sizes to estimate savings before integrating a build tool like Webpack or Vite.

Related Tools

Code Beautifier

Beautify minified code in JS, TypeScript, HTML, CSS, JSON, and XML.

SVG Optimizer

Optimize SVG files by removing bloat and reducing file size.

JSON Formatter

Format, validate, and beautify JSON with syntax highlighting.

Regex Tester

Test and debug regular expressions with real-time match highlighting.

FAQ

How much file size reduction can I expect?+

Typical savings are 10–40% for HTML, 15–50% for CSS, and 30–60% for JavaScript, depending on code verbosity and comment density.

Does minification affect functionality?+

No — minification only removes whitespace and comments. It does not alter logic or rename variables (that would be obfuscation).

Is CSS variable and custom property minification supported?+

Yes. CSS custom properties, variables, and modern syntax are all handled correctly.