HTML Prettifier & Minifier

Format, prettify, and minify HTML in your browser. Indent nested tags, remove optional closing tags, strip comments and whitespace. No upload, no size limit.

Output

Error

How it works

Format parses the HTML into a token stream and re-indents each element based on its depth in the DOM tree. Select 2 or 4 spaces, or tabs, from the dropdown.
Minify strips all non-essential whitespace between tags, removes comments, and collapses text nodes to single spaces or nothing where safe.
The byte count comparison shows input vs output size so you can see the compression ratio.
Runs entirely in the browser — nothing is uploaded or transmitted.

What minification removes

HTML minification targets the markup layer: all unnecessary whitespace between tags, leading and trailing whitespace in text nodes, and HTML comments (``). It does not touch attribute values, inline CSS, or inline JavaScript — those should be minified separately with the CSS and JS tools.

Format options

The beautifier indents nested tags with your chosen indentation size (2 spaces, 4 spaces, or tabs). Optional closing tags like `</p>`, `</li>`, `</tr>`, and `</td>` are preserved. The output is valid, indented HTML that is easy to read and edit.

Frequently Asked Questions

Does this handle incomplete or malformed HTML?

The beautifier assumes well-formed HTML. For fragments with missing closing tags it may produce unexpected indentation. For broken HTML, use the JSON Repair tool to fix it first.

Does minification remove CSS and JS inside the HTML?

No. This tool only operates on the HTML markup itself. Use the CSS Formatter and JavaScript Beautifier separately for those resources.

Is my data sent to a server?

No. Every tool on jsonversal runs entirely in your browser using the Web Crypto API, File API, and Clipboard API. Nothing is ever uploaded — not even the JSON you paste in.

Do I need an account or API key?

No signup, no email, no API key. All tools are free to use with no signup required.

Can I use these tools offline?

Yes. Once the page loads, all tools work offline. There are no external API calls or CDN dependencies at runtime.

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Your data never leaves your device

All processing happens in your browser. No uploads, no tracking, no servers. Your API keys, configs, and private payloads stay private — 100% client-side.