HTML Formatter & Minifier

HTML Formatter & Minifier — Free HTML formatter and minifier. Paste any HTML and beautify it with clean indentation to make it readable, or minify it to remove whitespace and reduce file size. No signup required.

—Original

—Output

—Change

HTML Input

Formatted HTML

HTML Input

Formatted HTML

When to format HTML

HTML from CMSs, template engines, and copy-paste is often minified or inconsistently indented. Beautifying it makes the structure visible — you can see parent-child relationships at a glance, spot unclosed tags, and navigate the document easily.

Minifying goes the other direction: it strips comments and collapses whitespace to produce the smallest possible output, reducing bytes sent to the browser.

How indentation works

Each nested element is indented by 2 spaces relative to its parent. Block elements (div, section, article, ul, li, etc.) each get their own line. Inline elements (a, span, strong, em) stay on the same line as their surrounding text. Void elements (br, hr, img, input) are self-closing and don't increase indent.

Content inside <script>, <style>, and <pre> blocks is preserved exactly — whitespace in these tags is meaningful and must not be changed.

HTML vs CSS vs JS minification

HTML minification typically saves 5–20%. CSS minification saves 20–40%. JavaScript minification saves 40–70% (with variable renaming). For maximum performance, minify all three — most build tools do this automatically in production.

HTML: remove comments, collapse whitespace between tags
CSS: also remove redundant semicolons, collapse shorthand values
JS: also rename local variables, remove dead code (tree-shaking)

Frequently Asked Questions

What does HTML beautification do?

Beautification adds consistent indentation and line breaks to HTML, making it easy to read and navigate. Nested elements are indented under their parent tags. This is useful when working with minified or poorly formatted HTML from a CMS, template engine, or copy-paste.

What does HTML minification do?

Minification removes HTML comments, extra whitespace, and line breaks. The result is the same webpage in fewer bytes. Smaller HTML means faster page loads and better Core Web Vitals scores.

Is it safe to minify HTML in production?

Generally yes — browsers parse minified HTML identically. One caveat: whitespace between inline elements (like <span> or <a>) can affect rendering in rare cases. Always test after minifying. Most frameworks and CDNs handle HTML minification automatically.

Does this preserve script and style content?

Yes — the contents of <script>, <style>, and <pre> blocks are preserved as-is during beautification and not reformatted. Only the surrounding HTML structure is re-indented.