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DevUtil

HTML Formatter & Minifier - Format or Minify HTML Online

HTML input

About HTML Formatter & Minifier

This tool helps you tidy up messy HTML or compress it for production. The formatter applies tag-aware indentation, meaning it understands HTML structure and indents nested elements correctly. Self-closing elements like <img>, <br>, and <input> are fully supported and handled without producing invalid nesting. The minifier strips out comments and collapses whitespace to deliver the smallest possible output.

How to Use

Paste your HTML into the input area and select either format or minify. The processed result appears immediately. You can then copy the output to your clipboard and use it in your project. The tool works with full HTML documents as well as partial fragments.

Features

  • Tag-aware indentation that reflects the true nesting structure of your HTML.
  • Correct handling of self-closing (void) elements such as <br>, <img>, and <hr>.
  • Minification that removes comments and unnecessary whitespace for smaller file sizes.
  • Works with full HTML documents and partial code fragments.
  • Entirely client-side processing, so your HTML never leaves your browser.

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Frequently Asked Questions

How does the HTML indentation work?
The formatter parses your HTML and applies indentation based on the nesting depth of each element. Opening tags increase the indent level, closing tags decrease it, and inline content is placed appropriately within its parent. This produces a clear, hierarchical structure that reflects how your elements are nested.
How are self-closing tags handled?
Self-closing (void) elements such as
, , , and
are recognised and handled correctly. They are indented to the proper level without expecting a corresponding closing tag, so the output remains accurate and well-structured.
What happens to HTML comments during formatting and minification?
When formatting, HTML comments are preserved in place so your annotations and conditional comments remain intact. When minifying, all comments are removed along with unnecessary whitespace to produce the smallest possible output.
Is my HTML data kept private?
Yes. All processing runs entirely in your browser. Your HTML is never uploaded to any server, so your markup and any content within it stays completely private on your machine.