HTML Minifier
Minify HTML instantly in your browser — removes comments and unnecessary whitespace while preserving the content of <pre>, <textarea>, <script>, and <style> blocks exactly.
What Is HTML Minification?
Minification strips the parts of an HTML document that exist purely for a human editor's benefit — comments and the indentation between tags — without changing what the page renders. Browsers already ignore most whitespace between tags, so removing it costs nothing visually while trimming page weight.
Why Minify HTML?
Comments and formatting whitespace can add up across a large template, and every byte shipped to a visitor is a byte that has to download before the page renders. Minifying HTML before deployment removes that overhead for zero visual cost.
How This Tool Works
This minifier runs entirely in your browser. Paste your HTML into the text area, click Minify, and get compact output instantly. It removes comments and collapses whitespace between tags, while leaving the exact content of <pre>, <textarea>, <script>, and <style> blocks untouched — those are where whitespace can be meaningful. Your data is never uploaded to any server — minification happens locally on your device.
Formatted vs. Minified HTML
| Feature | Formatted HTML | Minified HTML |
|---|---|---|
| Layout | Indented, one element per line | Comments and inter-tag whitespace removed |
| File size | Larger | Smaller |
| Human readability | Easy to scan | Hard to scan |
| Best for | Development, debugging | Production page weight |
What Gets Removed
- HTML comments (
<!-- ... -->) - Line breaks and indentation between tags
What Stays Untouched
- The exact content of
<pre>and<textarea>(whitespace there is part of what's displayed or submitted) - The exact content of
<script>and<style>blocks (whitespace inside JS/CSS can be meaningful, and needs its own minifier — see our CSS/JS Minifier) - All attributes, attribute values, and text content
Common Scenarios for Minifying HTML
Shrinking a Static Page Before Deployment
If your build process doesn't already minify output HTML, running the final markup through this tool trims comments and formatting whitespace before it ships — a quick win with no visual side effects.
Cleaning Up an Emailed HTML Template
Email templates are often hand-formatted with heavy indentation and leftover comments. Minifying before sending through an email service can help stay under size limits some providers impose.
Embedding HTML Inside Another File
When markup is embedded as a string literal inside a JS bundle, a config file, or a CMS field, a formatted version brings its indentation along for the ride. Minifying it first keeps the surrounding file lean.
Preparing a Snapshot for Storage
An HTML snapshot saved to a database or cache is never read directly by a person — minifying it before storage saves space with no functional downside.
Trimming a Server-Rendered Template's Output
If a templating engine's output isn't already minified, running it through this tool before serving shaves off whitespace bytes on every request. If page weight is the goal, oversized images are usually the bigger win — our Image Resizer is a good next stop for the same page's assets.
Other Ways to Minify HTML
You can also minify HTML using the html-minifier-terser command-line tool, or as part of a build pipeline (webpack, Vite, etc.) that already minifies HTML output. FileCast is useful for a quick, one-off minification without setting up a build.
Frequently Asked Questions
Is it safe to minify my markup here?
Yes. This tool processes your markup entirely in your browser. Nothing is uploaded to any server — minification happens locally on your device. No one else can see or access your data during or after minification.
Will this break my page's appearance?
No. It only removes comments and whitespace that browsers already treat as insignificant between tags. The content of <pre>, <textarea>, <script>, and <style> blocks is left completely untouched, since whitespace inside those can be meaningful.
Why does some whitespace remain right next to a preserved block?
Where a <pre>, <textarea>, <script>, or <style> block sits directly next to other content, this tool leaves a single space rather than removing it entirely. That's deliberate: a run of whitespace next to an inline element (like a <span>) can be visually significant, and this tool would rather leave one harmless space than risk changing your page's rendered spacing.
Does this minify the CSS or JavaScript inside <style> and <script> tags?
No — their content is preserved exactly, comments included. For that, use our dedicated CSS/JS Minifier, which safely tokenizes CSS and JS syntax instead of treating it as plain HTML text.
Can I minify multiple files at once?
This tool minifies one input at a time. Paste your HTML, minify it, and copy or download the result. For additional files, clear the input and repeat the process.