HTML Beautifier

The HTML Beautifier reformats minified, compressed, or poorly indented markup into clean, readable HTML — proper indentation based on tag nesting, one element per line, and optional comment/blank-line cleanup — so you can actually read and debug the DOM structure. Paste minified HTML, a CMS export, or messy markup from anywhere, and get formatted output instantly.

• •Indentation: 2 spaces, 4 spaces, or tabs, reapplied automatically based on tag nesting depth
• •Automatic tag reformatting: each element is placed on its own line and indented to reflect parent-child structure
• •Void/self-closing element awareness: tags like <img>, <br>, <input>, and <meta> are recognized and never given a false indent level
• •Comment removal (optional): strip <!-- --> comments while reformatting, or keep them
• •Empty line removal (optional): collapse leftover blank lines from templating engines or generated markup
• •Real-time structural validation: flags unclosed tags, mismatched closing tags, and unexpected closing tags with line numbers

• •Debugging a minified production page or CMS-exported markup by reformatting it to see the real DOM structure
• •Reviewing HTML generated by a templating engine (Handlebars, EJS, Pug) or server-rendered framework before committing
• •Making single-line or obfuscated HTML from a scraped page or email template readable
• •Standardizing indentation across a codebase or before a code review
• •Tracing a layout bug by seeing exactly how elements are nested inside one another

1. 1.Paste your HTML into the input editor, or upload a .html/.htm file
2. 2.Choose indentation style (2 spaces, 4 spaces, or tab)
3. 3.Toggle comment removal and empty-line removal as needed
4. 4.Formatted output with proper nesting appears automatically as you type
5. 5.Copy the output or download it as a .html file

• •Void elements (br, hr, img, input, meta, link, area, base, col, embed, param, source, track, wbr) are excluded from indentation increases, so they won't falsely nest the tags that follow them
• •Content inside <script> and <style> blocks is reformatted as plain text alongside the surrounding markup rather than reparsed as JS/CSS — unusual inline script content containing tag-like strings can occasionally affect the line-splitting step
• •The validator is a lightweight tag-stack checker, not a full HTML5 parser — it catches unclosed, mismatched, and unexpected closing tags, but not every spec-level markup error

• •This is a formatting tool, not an HTML linter or accessibility checker — it won't catch missing alt attributes, invalid ARIA usage, or other semantic issues
• •Extremely large HTML files (multi-MB exports) may be slow to reformat entirely in the browser
• •For enforcing a consistent HTML style across a team or repository, a dedicated formatter integrated into your editor/CI (e.g. Prettier) is more appropriate than ad hoc browser formatting

If you have readable HTML and need to shrink it for production — reducing page weight and improving load time — use the HTML Minifier instead. It strips comments and whitespace, minifies inline CSS/JS, and shows you the exact size reduction.