HTML Minifier

It removes unnecessary whitespace, comments, empty attributes, and optional closing tags from HTML to reduce file size. The rendered output of the page stays exactly the same — only the source code is compressed.

No. The minifier only removes content that is invisible to browsers: extra spaces between tags, HTML comments, and optional markup. It preserves <pre>, <textarea>, <script>, and <style> blocks where whitespace is meaningful.

HTML5 allows omitting certain closing tags (like </p>, </li>, </td>) where the parser can infer them automatically. Enabling this removes those tags for a smaller file, but some older XML-based pipelines may require them.

Yes. When enabled, the tool strips comments and collapses whitespace inside <style> and <script> blocks. It performs conservative minification that is safe for the vast majority of code.

Boolean attributes like checked, disabled, readonly, and required can be written as just checked instead of checked='checked'. Removing the redundant value saves a few bytes per attribute.

When safe, yes. HTML5 allows unquoted attribute values that contain only letters, numbers, dots, hyphens, and underscores. Removing quotes around simple values trims a couple of bytes per attribute.

Yes — drag and drop an .html or .htm file onto the input area, or use the Upload button. The file is read locally in your browser and never sent to a server.

Typical HTML minification saves 10–25% of file size, depending on how much whitespace and commenting the original contains. Hand-written HTML with generous indentation often shrinks the most.

No. Minification runs entirely in your browser using vanilla JavaScript. Your markup — including any embedded styles, scripts, or proprietary data — never leaves your device.