Will this break my page's rendering?

No — it only removes comments and collapses whitespace between tags, transformations that don't affect how HTML actually renders.

Does it minify inline CSS or JavaScript?

No — content inside and tags is left as-is; use our dedicated CSS Minifier and JS Minifier tools for those separately.

How much size reduction should I expect?

It varies by how much whitespace and commenting your source has — commonly 10-30% for well-formatted, comment-heavy source HTML.

Is my HTML uploaded anywhere?

No — minification runs entirely in your browser.

Can I un-minify the result later?

Use our HTML Formatter / Beautifier tool to re-indent minified HTML back into a readable format.

Free Online HTML Minifier

Strip Comments and Whitespace From HTML to Reduce File Size

Need to use HTML Minifier right now?

HTML written with readable indentation is great for editing but adds unnecessary bytes to every page load — comments, extra whitespace between tags, and multiple consecutive spaces all get sent to every visitor for no functional benefit. This tool strips all of that out, producing a smaller HTML payload that renders identically.

No sign-upNo uploads 100% free

54 → 29 characters (46% smaller)

<div><p>Hello world</p></div>

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Features

Runs entirely in your browser
Privacy-first — your data is never uploaded
Real-time, instant results
100% free, no sign-up required
Works on desktop, tablet, and mobile
No installation needed

Who uses this tool?

Software engineersWeb developersAPI testersDevOps engineersStudents

People also search for

Minify HTML Online HTML Compressor JSON Formatter tool JSON Validator tool JSON Minifier tool

About HTML Minifier

The minifier removes HTML comments entirely, collapses whitespace between tags down to nothing, and reduces runs of multiple spaces to a single space — safe transformations that don't change how the page actually renders, since HTML doesn't treat whitespace between block-level tags as meaningful content.

This is a lightweight, safe minifier rather than a full HTML-aware minifier like html-minifier-terser — it won't minify inline JavaScript or CSS within `<script>`/`<style>` tags, and it doesn't remove optional closing tags or attribute quotes. For most static pages, it still meaningfully reduces file size with zero risk of breaking rendering.

How it works

Paste your HTML. Any formatted or partially formatted HTML document.
Comments and whitespace strip automatically. See the size reduction percentage live.
Copy the minified result. Ready to deploy as a smaller HTML payload.

Examples

Minifying a formatted page fragment

Input

<div>\n  <p>Hello   world</p>\n  <!-- comment -->\n</div>

Output

<div><p>Hello world</p></div>