HTML Minifier
Paste your HTML markup and receive a minified version in seconds — HTML comments are stripped, whitespace between tags is collapsed and unnecessary blank lines are removed. Everything runs locally in your browser so your code is never sent to any server. Smaller HTML means faster Time to First Byte, better Largest Contentful Paint and a snappier experience for every visitor.
How to Minify HTML
Paste your HTML document or snippet into the Input HTML textarea and click Minify HTML. The tool immediately shows the minified output, the original and minified byte sizes, and the percentage reduction. Click Copy Minified HTML to copy the result. You can then paste it into your CMS template, server-side rendering output, or static file.
What HTML Minification Removes
This minifier applies the following safe transformations:
- HTML comments — all
<!-- ... -->blocks are removed (except IE conditional comments which are less common today). - Inter-tag whitespace — multiple spaces, tabs and newlines between HTML tags are collapsed to a single space.
- Leading and trailing whitespace — blank lines at the start and end of the document are trimmed.
- Redundant blank lines — consecutive empty lines inside the markup are collapsed.
Content inside <pre>, <textarea>, <script> and <style> tags is not altered to avoid breaking formatting-sensitive content or inline code.
HTML Minifier vs Build Tools
This online tool is ideal for quick one-off tasks — pasting a template snippet, compressing a landing page, or experimenting with size savings. For automated production workflows, integrate a dedicated minifier into your build pipeline. Popular options include html-minifier-terser (Node.js), Vite's built-in HTML processing, or server-side solutions for frameworks like Laravel, Django and Next.js. Build-tool minifiers can go further by also minifying inline CSS and JavaScript, which this lightweight browser tool does not do.
Impact on SEO and Performance
HTML minification is a recommended optimisation in Google's PageSpeed Insights and Lighthouse audits. Reducing document size lowers Time to First Byte (TTFB), helps pages reach the First Contentful Paint threshold faster, and reduces total bandwidth — which benefits users on mobile networks. While the raw savings per file may be modest (5–20%), the gains compound across thousands of daily page views and become significant at scale.
Frequently Asked Questions
Does HTML minification affect SEO?
No — search engine crawlers handle minified HTML identically to formatted HTML. Minification can actually boost rankings indirectly by improving page speed, which is a confirmed Google ranking signal.
Is it safe to minify all HTML?
Generally yes. Use caution with whitespace-sensitive content like <pre> blocks or poetry. This minifier preserves <pre> and <textarea> content. Always test minified output before deploying.
How much can HTML minification save?
Most HTML documents shrink by 5–20% from minification. Combined with Gzip or Brotli server compression, total transfer size can be reduced by 60–75% compared to the original uncompressed file.
Can I minify HTML with inline CSS and JS?
This tool preserves inline <style> and <script> blocks without minifying them further. For full inline minification, use a build tool like html-minifier-terser or Vite which can handle embedded CSS and JavaScript.