HTML Formatter & Compressor
Format or compress HTML code with custom indentation and real-time preview
HTML Minifier & Beautifier Documentation
What is this tool?
This tool allows you to minify (compress) or beautify HTML code. Minification removes unnecessary whitespace and comments to reduce file size for production deployment. Beautification formats HTML with proper indentation to improve readability during development.
Key Features
- Minify HTML - Remove whitespace, line breaks, and comments to reduce file size
- Beautify HTML - Format HTML with proper indentation and line breaks for improved readability
- Customizable indent size (2 spaces, 4 spaces, or tab)
- Option to preserve comments during minification
- File size comparison showing compression ratio
- Real-time HTML preview feature to instantly view code rendering effects (sandbox security protection)
Common Use Cases
- Optimize HTML files for production deployment to reduce page load time
- Format minified HTML for easier debugging and code review
- Clean up inconsistently formatted HTML code
- Reduce bandwidth usage by serving minified HTML to users
Best Practices
Minify HTML in Build Process
Use build tools like Webpack html-loader, Gulp, or posthtml to automatically minify HTML during deployment. Avoid manual minification.
Preserve Conditional Comments
Some HTML comments are functional (e.g., IE conditional comments). Configure the minifier to preserve necessary comments or use <!--[if IE]> syntax.
Handle Inline Scripts Carefully
Inline JavaScript and CSS in HTML require special handling. Use separate minifiers for each language, or ensure your HTML minifier supports them.
Preserve Whitespace in Specific Tags
Whitespace inside the following tags is meaningful: <pre>、<code> 和 <textarea>。 Configure the minifier to preserve whitespace in these elements.
Test Visual Appearance
HTML minification may affect layout if whitespace between inline elements is important. Always test visual appearance after minification.
Combine with Compression
In addition to HTML minification, enable server-side Gzip/Brotli compression. Text-based HTML compresses well, typically achieving over 70% reduction.
Troubleshooting
Why does layout break after minification?
Whitespace between inline-block or inline elements affects layout. Adding CSS 'font-size:0' to the parent element or using flexbox can solve this, or configure the minifier to preserve some whitespace.
Why don't my inline scripts work?
HTML minifiers may mishandle