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HTML Formatter & Beautifier

Format, beautify, validate, and minify HTML instantly in your browser. Improve readability, fix indentation, inspect the DOM, and catch accessibility and SEO issues without uploading a single file.

✓ Everything happens in your browser · ✓ No HTML is uploaded · ✓ Works offline
HTML Input
⏳ Ready
0 chars · 0 linesPlease paste or load HTML.
Formatted HTML Output
Formatted output will appear here.Ctrl+Enter · Copy
Characters
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Lines
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Words
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Tags
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Unique Tags
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Div Count
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Span Count
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Images
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Scripts
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HTML Insights

Quick diagnostics for accessibility, semantics, and maintainability.

DOM Tree View

Tag Summary

Search & Replace

Diff Preview

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⚡ Instant formatting

Beautify markup as you work with a fast, responsive workflow.

🧠 DOM insights

Inspect nesting, tag patterns, and accessibility-oriented issues.

🔒 Private by design

Everything stays on your device. No uploads, no tracking, no backend.

📱 Responsive

Use the tool comfortably on desktop, tablet, or mobile.

What is an HTML Formatter?

An HTML formatter turns messy markup into readable, consistent code. It adds indentation, normalizes spacing, and helps developers compare structure quickly. Whether you are reviewing generated markup, cleaning up pasted templates, or preparing files for a repository, formatting makes the code easier to scan and maintain.

That is why an HTML formatter is a core part of modern front-end and CMS workflows. It improves collaboration, reduces merge noise, and makes debugging more manageable when you are working with nested components or templated layouts.

Why Use an HTML Beautifier?

Beautifying HTML improves team collaboration, simplifies code reviews, and makes debugging easier. Developers can spot missing tags, misordered attributes, and layout issues far faster when the markup is structured predictably. It also helps learners understand the relationship between parent and child elements.

HTML Formatter Features

HTML Formatting Best Practices

Consistent indentation, semantic HTML, meaningful nesting, and accessible labels make a difference over time. Avoid overly deep nesting where possible, keep comments purposeful, and prefer semantic landmarks such as header, main, section, article, and footer over generic wrappers whenever the content allows it.

HTML Formatter vs HTML Minifier

Browser Support

The tool runs entirely inside modern browsers. After the page loads, it works offline and does not rely on a remote backend, API, or server-side formatter to produce output.

Frequently Asked Questions

Is this HTML formatter free?
Yes. It is completely free and works without an account.
Is my HTML uploaded?
No. Everything is processed locally in your browser.
Can I format large HTML files?
Yes. The editor remains responsive and supports large documents.
Can I format HTML5?
Yes. The tool handles modern HTML5 markup and common semantic elements.
Does it validate HTML?
Yes. The page provides a validation snapshot and a set of HTML diagnostics.
Can I remove comments?
Yes. The comments option lets you preserve, remove, or collapse them.
Can I minify HTML?
Yes. Use the minify button to strip whitespace and shrink the output.
Can I format embedded CSS?
Yes. The formatter uses a browser-side flow that preserves embedded CSS and JavaScript blocks while improving surrounding structure.
Can I format embedded JavaScript?
Yes. The same workflow keeps embedded script blocks readable and consistent.
Does it work offline?
Yes. After the page has loaded, it continues to work without a network connection.