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HTML Formatter & Beautifier
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HTML Formatter & Beautifier

Format and beautify raw HTML scripts with nested indentation tags.
Last updated: July 7, 2026•100% Client-Side & Private
HTML Formatter
Indent:
HTML INPUT

HTML to Format

Paste unformatted HTML document strings or upload a file.

orOpen Fileor Drag & Drop
BEAUTIFIED HTML
Beautified HTML will appear here...

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About this Tool

Auto-indent, clean up, and validate HTML markup locally with support for dynamic spacing and wrapping.

1What is an HTML Formatter?

An HTML Formatter is a layout tool that formats dense HTML markup into clear, nested structures. By parsing tags and attributes, it adds indentation to isolate structural components. The formatter runs client-side to ensure that your markup remains completely secure. Additionally, the utility generates clean, standardized code syntax that complies with modern web validation standards and SEO guidelines. The responsive layout makes it easy to format, edit, and copy outputs on both mobile viewports and desktop workstations. This local execution model bypasses browser network dependencies, offering a snappy user experience for editing frontend stylesheets, vector assets, and HTML layouts. By utilizing local browser sandbox isolation and client-side processing, Secure Devutils protects your intellectual property and private credentials from external logging pipelines and third-party data tracking networks. For more details, explore our blog articles: Why Offline-First Developer Tools Matter and The Hidden Risks of Online Developer Tools.

2Example: Before and After

Input HTML:
<div class="card"><h1 id="title">Hello World</h1><p>Welcome to our site.</p></div>
Output HTML:
<div class="card"> <h1 id="title">Hello World</h1> <p>Welcome to our site.</p> </div>

3Configurable Layout Styles

Tailor the formatting output to match your frontend coding guidelines. Adjust indent sizes (2 spaces, 4 spaces, or Tabs), configure whether tags like <script> or <style> should be formatted, and choose between wrapping lines.

4Client-Side Security and Speed

Formatting whole HTML pages can involve sensitive layouts or draft content. Our formatter runs completely client-side in your browser. This enables instant formatting of large files without server round-trips or privacy leaks.

Privacy Guarantee

The HTML Formatter & Beautifier operates 100% locally in your web browser. All code beautification, formatting, and side-by-side text comparisons are handled locally in your browser memory. Your source code files, configurations, and differences are kept private.