Online HTML Minifier & Formatter
Compress HTML markup to speed up page loads, or beautify minified code into clean, structured HTML. 100% private in-browser tool.
At a glance
HTML Minifier & Markup Formatter is a free online tool that minifies HTML markup to compress page size or beautify messy HTML code with custom indentation. It safely preserves sensitive tags like <pre>, <code>, <textarea>, <script>, and <style> untouched. Nothing is uploaded and no sign-up is needed — everything runs on your device.
100% In-Browser HTML Compaction
All minification, comment stripping, and code formatting runs directly inside your browser memory. No code is transmitted to external servers.
Core Capabilities
- Dual Mode Compactor: Minify production HTML to decrease file payload, or beautify minified code into clean human-readable markup.
-
Verbatim Block Protection: Safely preserves sensitive tags like
<pre>,<code>,<textarea>,<script>, and<style>untouched. -
Void Element Awareness: Accurately formats void tags (
<img>,<input>,<meta>,<br>) without breaking DOM hierarchies. - 100% In-Browser Privacy: No code leaves your computer. Safely compress proprietary templates and internal portals.
How to Use
- 1 Paste or Upload HTML: Paste your markup into the input editor, drop a file, or pick a sample preset.
- 2 Choose Minify or Beautify: Select your desired processing mode and configure comment or whitespace options.
-
3
Copy or Download: Inspect the compression metrics and copy the result or download the
.htmlfile.
Frequently Asked Questions
Why should I minify HTML code?
Minification removes unnecessary whitespace, redundant line breaks, and developer comments from your HTML markup. This reduces byte payload sizes, speeds up page load times, decreases Time to First Byte (TTFB), and saves network bandwidth.
Does minifying HTML break preformatted code or inline scripts?
No. This tool isolates and preserves verbatim blocks like <pre>, <textarea>, <script>, and <style> before minification occurs, ensuring formatting and syntax integrity remain 100% intact.
Is my source code uploaded anywhere?
No, never. All processing executes strictly inside your browser's local JavaScript engine. Zero markup, tokens, or scripts are sent across the internet.
Why Use This HTML Minifier & Markup Formatter?
How to Use HTML Minifier & Markup Formatter
Paste or Upload HTML
Paste your markup into the input editor, drop a file, or pick a sample preset.
Choose Minify or Beautify
Select your desired processing mode and configure comment or whitespace options.
Copy or Download
Inspect the compression metrics and copy the result or download the .html file.
Landing Hero Compaction: Comments Stripped, Tags Collapsed
The engine masks verbatim blocks (pre, script, style), strips HTML comments and collapses inter-tag whitespace with regex, then restores protected blocks in the browser.
<div class="hero"> <h1>Hello World</h1> <p>Fast delivery</p> </div>
<div class="hero"><h1>Hello World</h1><p>Fast delivery</p></div> 212 B to 64 B, saved 69.8%
Technical Specifications & Engine Details
| Specification | Details |
|---|---|
| Supported Formats | HTML, HTM, TEXT → HTML, MIN.HTML, TEXT |
| Execution Mode | 100% Client-Side In-Browser (client) |
| Browser Requirements | Requires modern web browser with ECMAScript 6+ and standard DOM Web APIs. |
| Performance Constraints | Client browser memory limit (typically 1–2 GB RAM); processing speed depends on local device CPU. |
100% Client-Side Privacy Guarantee
All HTML minification and formatting calculations run locally in your browser memory. Zero code is transmitted to external servers.
Frequently Asked Questions
Why should I minify HTML code?
Does minifying HTML break preformatted code or inline scripts?
Is my source code uploaded anywhere?
Methodology
This tool runs entirely in your browser. The example above shows a representative input and the result it produces.
Last updated .