HTML Formatter

The HTML Formatter is a free online tool that takes raw, minified, or poorly structured HTML and transforms it into clean, properly indented, human-readable markup. Whether you've copied HTML from a production build, received compressed source code, or simply written markup in a hurry, this tool restores consistent formatting so the structure is immediately clear.

For developers, readable HTML is not just a matter of aesthetics — it directly affects how quickly you can debug, review, or modify code. Properly indented tags reveal nesting relationships at a glance, making it easy to spot unclosed elements, misplaced attributes, or deeply nested structures that would otherwise be invisible in a wall of compressed text.

Using the HTML Formatter is straightforward: paste your raw or minified HTML into the input area and the tool instantly outputs a beautified version with consistent indentation and line breaks. Each nested element is indented relative to its parent, inline elements are kept readable, and block-level tags are placed on their own lines. You don't need to configure anything — sensible defaults handle the most common formatting patterns automatically.

The output is clean, standards-friendly HTML that you can copy directly back into your editor, a code review, or documentation. The formatter handles a wide range of real-world inputs including HTML fragments (not just full documents), templates with mixed content, and markup containing inline styles or data attributes.

A few edge cases worth knowing: extremely malformed HTML — such as heavily broken tag nesting or invalid attribute syntax — may be reformatted on a best-effort basis, so always validate critical markup after formatting. Also, intentional whitespace inside elements like <pre> or <textarea> is preserved to avoid altering rendered output.