Instantly beautify, minify, validate and analyse your HTML code — no sign-up needed. Works 100% in your browser.
An HTML formatter — also called an HTML beautifier or HTML pretty-printer — is a developer tool that automatically restructures raw or minified HTML markup into a clean, consistently indented, human-readable format. When you write HTML rapidly, copy-paste snippets from multiple sources, or receive machine-generated markup from a CMS or templating engine, the resulting code can become a tangled wall of text that's nearly impossible to debug. An HTML beautifier solves this instantly.
How to use it: Simply paste your unformatted HTML into the input panel, choose your preferred indentation style (2 spaces, 4 spaces, or tabs), then click Format HTML. The tool re-indents every nested element, aligns attributes, preserves your original content, and surfaces any structural errors in real time.
Best practices for clean HTML include: always closing tags properly, using semantic elements (<article>, <section>, <nav>), quoting all attribute values, and keeping one attribute per line in complex tags. Consistent indentation makes peer reviews faster, reduces merge conflicts in version control, and helps AI-based coding assistants understand your document structure more reliably. Our free HTML formatter enforces all of these conventions automatically — no configuration required.
Professional-grade HTML formatting features, entirely in your browser.
Detects unclosed tags, missing attributes, improper nesting, and deprecated elements as you type, with instant visual feedback.
Color-coded output distinguishes tags, attributes, values, and comments for immediate visual clarity.
Strips whitespace, comments, and redundant attributes to produce the smallest possible HTML for production deployment.
Choose between 2 spaces, 4 spaces, or tab indentation to match your team's coding style guide.
View character count, line count, tag count, and size reduction statistics at a glance.
All processing happens locally in your browser. Your HTML code is never sent to any server.
Download the formatted HTML as a ready-to-use .html file with a single click.
Fully responsive layout works flawlessly on phones, tablets, and desktops without horizontal scrolling.
No account, no installation, no waiting. Just clean HTML.
Drop your raw, minified, or messy HTML code into the input editor — or click "Load Sample" to try an example.
Select your indentation style and line-wrap preference from the toolbar dropdowns.
Click "Format HTML" to beautify, then copy the result to clipboard or download it as an .html file.
Quick answers about HTML formatting and beautification.
HTML formatting (beautification) adds indentation and line breaks to make code readable by humans. Minification does the opposite — it removes all whitespace to reduce file size for faster page load in production environments. Both operations are purely cosmetic and do not affect how browsers render the page.
In virtually all cases, no. HTML formatting only changes whitespace between tags. The one exception is inline elements (like <span> or <a>) inside text nodes — adding a line break can sometimes introduce a small visual space. Our formatter is aware of this and handles inline elements intelligently.
Yes. Because all processing runs locally in your browser, file size is only limited by your device's available memory. We have successfully tested files exceeding 1 MB. For very large files, the formatting may take 1–2 seconds — a progress indicator will appear.
Absolutely. The formatter fully supports all HTML5 semantic elements including <article>, <section>, <aside>, <nav>, <main>, <figure>, <details>, <summary>, and all others defined in the HTML Living Standard.
Yes, completely free. There are no hidden fees, no usage limits, and no account required. You can format unlimited HTML files every day, forever.
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