Format HTML online and turn tangled markup into clean, properly indented code in one click. This free browser tool parses your raw HTML and re-outputs it with consistent indentation and readable structure, no signup, no upload needed. Useful for cleaning up minified templates, reviewing email HTML, or preparing markup for code review.
The HTML Formatter takes messy, minified, or poorly indented HTML and outputs clean, properly indented code that is easy to read, edit, and review. HTML from templates, CMS exports, or scraped web pages is often formatted inconsistently or compressed into single lines that are impossible to navigate. This formatter applies a consistent indentation structure that reflects the DOM hierarchy: child elements are indented relative to their parent, attributes are wrapped when lines exceed a configurable width, and inline elements are handled correctly (they stay on the same line as their content). The minify option does the reverse: removes all whitespace between tags to produce the most compact HTML for production use. The tool validates as it formats and reports parse errors. All processing runs in your browser with no server required.
HTML formatting is more complex than it appears because HTML has both block-level elements (div, p, h1-h6, ul, li, section) and inline elements (span, a, strong, em, code). Block elements should be on their own lines with indentation. Inline elements should stay on the same line as their text content to avoid creating unwanted whitespace in the rendered output (a line break between two inline elements like span tags creates a visible space in some browsers). This formatter correctly distinguishes block from inline elements and applies appropriate line break rules for each. Void elements (img, input, br, hr, meta, link) have no closing tag, and the formatter handles these without adding unnecessary slashes or closing tags. For embedded CSS in style tags and JavaScript in script tags, the formatter can optionally re-indent the code inside those elements. Common use cases include formatting HTML from a CMS export before putting it in version control, cleaning up HTML from a WYSIWYG editor that generates messy markup, preparing HTML snippets for a code review, and debugging complex nested structures in component templates. For Jinja2, Liquid, Handlebars, or other templating languages that embed in HTML, the formatter treats template tags as opaque text and does not attempt to parse them, preserving the template syntax.