Free tool for frontend developers
HTML Minifier — Online HTML Compressor
Minify or beautify HTML code. Reduce file size by 20-40% by removing comments, whitespace and unnecessary empty lines. Everything local in the browser.
How to minify HTML code?
HTML Minifier minifies HTML code in 3 steps: 1) Paste or load HTML code in the input field. 2) Choose the mode — Minify (removes whitespace, comments, reduces by 20-40%) or Beautify (formats with indentation). 3) Click the button and copy the result. Everything is processed locally in the browser — your HTML is not sent to the server. Ideal for production deployment when every KB counts for page load speed.
- 2 modes — Minification (-20-40%) and Beautify (formatting)
- Removes comments, whitespace, empty lines
- Statistics — original vs result size + savings
- Local in the browser — without sending to the server
HTML Minifier
Paste HTML code, choose a mode and click the button. Everything is processed locally in the browser.
Privacy: Everything is processed locally in the browser using regex. Your HTML code is NOT sent to the server or stored.
Why minify HTML?
HTML minification reduces file size by 20-40% by removing unnecessary characters that the browser does not need: comments (<!-- -->), whitespace (spaces, tabs), empty lines and unnecessary attribute quotes. Smaller HTML = faster page load = better Core Web Vitals = better SEO.
When to use minification
Minification is applied in the production build, not during development. Reasons: 1) Reducing page weight (Lighthouse score), 2) Fast transfer over slow mobile networks (3G/4G), 3) Fewer bytes on services that charge by bandwidth (Cloudfront, S3), 4) Modern build tools (Webpack, Vite, Next.js) already minify automatically — our tool is for one-time manual processing.
Beautify (debug mode)
Beautify does the opposite of minification — formats HTML with indentation (2 spaces), new lines after tags and one attribute per line if there are many. Useful when you get minified HTML from production and need to debug the structure. With beautify, the code is readable for code review.
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Frequently asked questions - HTML Minifier
Answers to the most common questions about our services.
Call us: support works 24/7, by phone and through tickets.
(+381) 60 3535 720Does minification break my HTML?
Our tool does conservative minification — removes only safe whitespace (multiple spaces into one, empty lines, comments). It does NOT touch: 1) text content between tags (spacing between words is preserved), 2) <pre> and <textarea> content (these preserve formatting), 3) inline JavaScript or CSS inside HTML. In 95% of cases minification is safe and does not break the site.
How much can I save with minification?
Typical savings are 20-40% depending on the HTML style. Sites with many comments, new lines and spaces (formatted templates) save more. Already minified HTML (e.g. from a Next.js build) cannot be reduced further. For maximum savings, combine HTML minification + CSS minification + JS minification + Brotli/GZIP compression on the server — this gives 70-80% reduction of the total page.
When NOT to use minification?
Do not use minification in development (makes debugging difficult) or on high-performance sites where build tools (Webpack, Vite, Next.js) already automatically minify in the production build. Our tool is for: one-time manual processing, learning (see what minification does), debugging minified code (with Beautify mode) and static sites without a build pipeline.
Does the tool store my HTML code?
Absolutely not. Everything is processed locally in your browser using JavaScript regex functions. Your HTML is NOT sent to the server or stored in a database. The tool also works offline. Your data never leaves your browser.
Can I use this for WordPress / React / Vue?
Our tool works with static HTML code. For WordPress, we recommend W3 Total Cache or LiteSpeed Cache (auto-minify). For React/Vue/Next.js — the build tool (Webpack/Vite) already minifies automatically in the production build. Our tool is ideal for: manually cleaning email templates, hand-coded landing pages, debugging minified HTML from other sources.
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30-day guarantee
We refund without questions in the first 30 days.
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