📄 HTML Formatter
Format and beautify HTML. Indent elements, normalize whitespace, and validate syntax — all in your browser, no upload, instant results.
About the HTML Formatter
This HTML formatter runs entirely in your browser. Paste your HTML content into the input box, choose an indentation style, and click Format to get beautifully indented output. You can also minify HTML to remove unnecessary whitespace, or validate to check for syntax errors. Nothing is uploaded to a server — all processing happens locally with the browser's built-in DOMParser.
Features
- Format — Pretty-prints HTML with consistent indentation (2 spaces, 4 spaces, or tab).
- Minify — Removes unnecessary whitespace between tags to reduce file size.
- Validate — Parses the HTML and reports whether it is well-formed.
- Void elements — Self-closing tags like
<br>,<img>,<input>are handled correctly. - Inline content — Text and inline elements are preserved without extra line breaks.
How to use
- Paste your HTML content in the input box.
- Choose your preferred indentation style.
- Click Format, Minify, or Validate as needed.
- Click Copy to copy the result, or Clear to start over.
Frequently asked questions
Does this tool upload my HTML? No. All formatting happens locally in your browser. Your data never leaves your device.
What is the difference between Format and Minify? Format adds indentation and line breaks for readability. Minify removes unnecessary whitespace to make the file as small as possible.
Are comments preserved? Yes, <!-- ... --> comments are kept in the formatted output.
Does it handle <pre> and <code> blocks? Yes. Whitespace inside <pre> and <textarea> elements is preserved as-is.