HTML Formatter

Format and beautify HTML markup online with clean indentation and proper tag nesting. Paste HTML and get readable, copy-ready output in seconds.

Input

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Output

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What is HTML Formatter

Last reviewed: April 18, 2026

HTML (HyperText Markup Language) is the core markup language for web pages, defining structure and content that browsers render.

HTML Formatter is an online tool that helps you format and beautify HTML.

It reformats HTML so the pasted content is easy to scan, diff, and share, no manual whitespace cleanup required.

Why use it

Make HTML easier to read, review, and debug.
Standardize HTML spacing and structure before sharing or committing output.
Clean up pasted HTML payloads from logs, APIs, or config files faster.
Avoid manual HTML formatting work when you need copy-ready output.

Example (before/after)

Before formatting

<main><section class="hero"><h1>DevFox</h1><p>Format HTML fast.</p></section></main>

After formatting

<main>
  <section class="hero">
    <h1>DevFox</h1>
    <p>Format HTML fast.</p>
  </section>
</main>

Common errors

Invalid syntax

The tool cannot process input that already contains broken syntax or malformed structure.

Fix: Check the pasted content first and correct the syntax error closest to the reported failure point.

Incomplete pasted input

Partial snippets often fail when opening and closing characters are missing.

Fix: Paste the full block or file so the tool can evaluate the complete structure.

Wrong content type

Formatting or validating the wrong format produces misleading errors.

Fix: Make sure the content matches the tool you are using before processing it.

FAQ

What does HTML Formatter do?

Format and beautify HTML markup online with clean indentation and proper tag nesting. Paste HTML and get readable, copy-ready output in seconds. Use it when you need a faster browser-based way to format and beautify HTML.

Is HTML Formatter free to use?

Yes. HTML Formatter is a free browser-based tool — no sign-up, no watermark, no rate limits for typical developer workflows.

Does HTML Formatter send my data to a server?

Almost all of the processing runs client-side in your browser, so pasted input stays on your device unless the tool explicitly calls an external API.

What input can I paste into HTML Formatter?

Paste the data type the tool is built for — plain text, code, or a structured payload — into the input panel. The tool processes it as you type.

Can I use HTML Formatter on mobile?

Yes. HTML Formatter is responsive and works on phones, tablets, and desktops. Copy-to-clipboard and download actions are wired for touch devices too.

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