HTML Minifier — Free Online Tool
Minify HTML — strip comments & whitespace, see size savings. · No signup · Works on mobile
100% private: your data is processed in your browser. Nothing is uploaded to our servers.
How to use the html minifier
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Paste your HTML source code into the input editor.
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Choose options — remove comments, collapse whitespace, preserve pre/textarea.
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Click Minify and copy the output; the size reduction is shown in bytes and percent.
What does this tool do?
This free HTML minifier shrinks your markup by removing comments, collapsing whitespace between tags, and stripping unnecessary line breaks — typically cutting HTML size by 15–30%. Paste your code, click Minify, and see exact bytes saved with the compressed output ready to copy.
How does the html minifier work?
The minifier removes HTML comments (preserving conditional comments), collapses runs of whitespace between tags to nothing and inside text to single spaces, while protecting the contents of <pre>, <textarea>, and <script> blocks where whitespace is meaningful.
Frequently Asked Questions
How much does HTML minification actually improve page speed?
Minification typically shrinks HTML 15–30% before compression. Combined with Brotli or gzip (which servers apply on top), the wire savings are smaller but still meaningful — and every KB matters for LCP on 4G. A 100 KB page commonly drops to 75 KB minified, then ~15 KB Brotli-compressed.
Can minification break my HTML?
Rarely, if whitespace-sensitive content is mishandled. This tool protects <pre>, <textarea> and inline <script> content automatically. One genuine edge case: inline-block layouts that depend on whitespace between elements — test visually after minifying if you use that pattern.
Is the HTML minifier really free?
Yes — 100% free with no hidden charges, trial limits, or premium tiers for core features. No account or email needed. The site is supported by non-intrusive display ads, which keeps every tool free for everyone.
Are my files private when using the HTML minifier?
Completely. The HTML minifier processes everything locally in your browser — your files are never uploaded to any server. When you close the tab, everything is gone. This makes it safe for confidential documents, client work, and personal photos.
Does the HTML minifier work on mobile phones?
Yes. It's built mobile-first and works on any modern phone browser — iPhone (Safari) and Android (Chrome) included. You can pick files straight from your camera roll and download results directly to your device.
Do I need to install any software to use the HTML minifier?
No. The HTML minifier runs entirely in your web browser — no downloads, extensions, or signup. Open the page, use the tool, download your result. It works on Windows, macOS, Linux, ChromeOS, iOS, and Android.