HTML Beautifier / Formatter — Pretty-Print HTML Online

What is HTML Beautify?

HTML beautification (pretty-printing) is the inverse of minification: take a compact HTML blob and lay it out with consistent indentation, one tag per line, and clear structure. Useful for debugging generated markup, reviewing framework output, or preparing HTML for a code review. This tool tokenizes without a full DOM parser (staying framework-agnostic and SSR-safe), then re-emits every tag on its own line at the correct indent depth. Void elements like <br> and <img> are normalized to XHTML-style <br /> for JSX / XHTML compatibility, and any element whose whitespace is semantically meaningful — <pre>, <textarea>, <script>, <style> — is left untouched.

How to beautify / format HTML online

1. 1Paste minified or messy HTML into the input pane.
2. 2Choose an indent size (2 spaces default, 4 for many teams, 0 for tabs).
3. 3The output pane updates instantly with clean, readable HTML.
4. 4Copy back into your editor for review, or diff against another version.

Use Cases

Key Concepts

Block vs inline elements

Block elements (div, p, section, h1, …) each get their own line. Inline elements (span, a, em, strong, …) can share a line with their surrounding text.

Preformatted preservation

Any content inside <pre>, <textarea>, <script>, or <style> is copied verbatim to preserve whitespace-dependent semantics.

Tips & Best Practices

• ▸This tool doesn't repair broken HTML — mismatched tags stay mismatched. For repair, paste into a browser and view Elements panel, which uses the built-in HTML5 parser.
• ▸For very long lines of text content inside <p> or <div>, the beautifier keeps them on one line — long-line wrap is a separate concern (editor / IDE responsibility).
• ▸Indent = 0 uses tabs — good for teams whose style guide is tab-based.
• ▸The beautifier preserves attribute order and casing (mostly) — it's not opinionated about your source style, just about layout.