Beautify or minify HTML markup instantly, with customizable indentation, attribute formatting, and file-size compression stats.
Real-time statistics describing document size, DOM tag counts, attributes, and nesting depth.
Access recent HTML markup snippets saved automatically in your browser's local storage.
HTML formatting takes raw markup and rewrites it with consistent indentation and line breaks so the tag structure is easy to read and debug. Minifying does the opposite: it strips whitespace, line breaks, and optionally comments so the file downloads and parses faster in production.
The formatter tokenizes the document into individual tags, text nodes, and comments, tracking void elements such as img, br, hr, and input that never receive a closing tag. Because indentation is calculated from actual nesting depth rather than guesswork, attributes, inline elements like span and a, and embedded style or script blocks are preserved exactly as written.
A minified snippet like '<div><p>Hello</p><img src="a.png"></div>' becomes a properly indented block once beautified, with the div, p, and self-closing img tag each placed on their own line at the correct nesting level. Switching the indent size selector between 2, 4, or 8 spaces, or tabs, re-runs the same structural logic with a different indent string.
Use the JSON Formatter when your project mixes HTML templates with JSON configuration or API responses, the Regex Tester to validate pattern-based find-and-replace rules before running them on markup, and the URL Encoder/Decoder when HTML attributes contain encoded query strings.
Quick answers about how this tool works.
Yes, the parser preserves all HTML tags, attributes, inline elements (like <span>, <a>, <strong>), and self-closing tags (like <img>, <input>, <br>).
No. All HTML formatting and minification operations run 100% locally in JavaScript inside your browser. Your code never leaves your device.
Yes, the formatter respects <style> and <script> blocks while maintaining overall document indentation.
You can choose between 2 spaces (standard for modern web apps), 4 spaces, or tab indentation.
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