HTML Minifier Online
Minify HTML by removing comments, collapsing whitespace, and stripping empty attributes.
What Is HTML Minification?
HTML minification reduces the file size of an HTML document by removing data that browsers do not need to render the page: comments, redundant whitespace between tags, and empty attributes. This HTML minifier processes your markup directly in the browser — no uploads, no server round-trips. Minified HTML loads faster, reduces bandwidth costs, and is a standard step in web performance optimization pipelines.
How to Use HTML Minifier
- Paste your HTML into the Input area, or click Load Sample.
- Choose which optimizations to apply: Remove Comments, Collapse Whitespace, Remove Empty Attributes.
- The minified output appears instantly in the Output area with the size reduction shown.
- Click Copy to copy the result to your clipboard.
Features
- Remove comments — strips HTML comments while preserving IE conditional comments
- Collapse whitespace — removes whitespace between tags and collapses multiple spaces
- Remove empty attributes — strips attributes like
class=""andid="" - Size reduction display — shows input/output sizes and percentage saved
- Live output — result updates as you type or toggle options
- Privacy-first — all processing is local, nothing is uploaded
FAQ
What is HTML minification?
HTML minification reduces the file size of an HTML document by removing data that is not needed for rendering: comments, extra whitespace, and empty attributes. Smaller HTML files load faster and reduce bandwidth usage.
Will minifying HTML break my page?
For most pages, no. Removing comments and collapsing whitespace between tags is safe. Be cautious with whitespace-sensitive elements like <pre> or inline elements where spacing affects layout.
Does this tool minify CSS and JavaScript inside HTML?
No. This tool only processes the HTML structure itself. Inline <style> and <script> blocks are preserved as-is. Use a dedicated CSS or JS minifier for those.
Is my HTML sent to a server?
No. All minification runs entirely in your browser using JavaScript. No data is sent to any server.