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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.

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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

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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.

Guide

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.

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)

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