HTML Formatter
Turn minified or one-line HTML into clean, indented markup — a simple, reliable beautifier for emails, templates and saved pages. 100% client-side.
This tool runs entirely in your browser. Your data never leaves your device — it is not uploaded to any server.
How to use
- 1Paste your HTML into the input box.
- 2The indented result appears live as you type.
- 3Copy the formatted markup or clear the input to format another snippet.
HTML Formatter
Paste crammed-together HTML and get readable, consistently indented markup back instantly. Void elements like img and br never break the indentation, common auto-closing tags such as li and p are handled sensibly, and the contents of pre, textarea, script and style blocks are preserved untouched.
A deliberate simple formatter: no reordering, no attribute rewriting, no surprises — just whitespace and line breaks added so the structure is obvious at a glance.
Frequently asked questions
Does formatting change how my HTML renders?
No — formatting only inserts whitespace and line breaks between tags. The contents of pre, textarea, script and style are preserved exactly, since whitespace there is meaningful.
How does it handle unclosed tags like li or p?
It knows the common auto-closing elements: a new li closes the previous one, and a closing tag for an ancestor pops all open children, so lists and paragraphs indent the way you expect.
Is the HTML sent to a server?
Never. The formatter is a local JavaScript tokenizer — your markup stays in your browser.
Is the output safe to paste into production code?
Yes. Formatting, escaping and conversion follow the relevant specs (RFCs, W3C, JSON Schema), and nothing is sent anywhere — you can verify the output locally before committing it.
Does it work on large inputs?
Yes — everything runs locally. A multi-megabyte JSON file or a long regex session is limited only by your machine, not by a request size cap.
Is this tool free to use?
Yes, completely free — no signup, no subscription, no daily limits, and no watermarks on the output.
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Embed this tool
Put this tool on your own site with one line — it runs entirely in the visitor's browser.
<iframe src="https://zoyku.com/en/tools/html-formatter?embed=1" width="100%" height="640" style="border:0;border-radius:16px" title="Zoyku — html-formatter" loading="lazy"></iframe>