Free HTML Minifier Online
Minify HTML code to reduce page size and loading time. Free, fast, and works entirely in your browser with no sign-up required.
HTML Minifier
Minify HTML code with inline CSS/JS minification, validation, batch processing, and multiple compression presets.
Input HTML
Output
About HTML Minifier
Advanced HTML minification with inline CSS/JS processing, syntax validation, and batch processing.
- Inline CSS & JavaScript minification
- HTML5 syntax validation with error reporting
- Three minification presets (Safe, Balanced, Aggressive)
- Boolean attribute collapsing (disabled="disabled" → disabled)
- Tag analysis with structure summary and nesting depth
- Batch processing for multiple HTML files
- Live HTML preview in sandboxed iframe
- Minification history saved to localStorage
- Gzip size estimation
Note: Content within <pre>, <code>, and <textarea> tags is preserved.
Privacy First: All processing happens locally in your browser. Your code is never sent to any server.
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Frequently Asked Questions
What is the HTML Minifier?
The HTML Minifier is a free online tool that compresses HTML code by removing extra whitespace, comments, and optional tags to reduce page size.
Is the HTML Minifier free?
Yes, it is completely free with no registration required. All minification happens client-side in your browser.
Does it preserve the page structure?
Yes, the HTML Minifier only removes unnecessary characters and formatting. Your page will render identically after minification.
Is my data safe with this tool?
Absolutely. The HTML Minifier processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.
Does the HTML Minifier work on mobile devices?
Yes, the HTML Minifier is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.
Do I need to create an account to use this tool?
No account or registration is needed. Simply open the HTML Minifier in your browser and start using it immediately. There are no sign-up walls or usage restrictions.
How do I use the HTML Minifier?
Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.
Which browsers are supported?
The HTML Minifier works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.
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About Free HTML Minifier Online
Free HTML Minifier Online is a free, browser-based tool in our Code Tools collection. Everything runs locally on your device — no uploads, no sign-up, and your data stays private.