HTML Formatter & Beautifier - Free Online Tool

An HTML formatter takes compressed or poorly spaced markup and outputs clean, indented HTML. It aligns nested tags, highlights common errors, and makes attributes easy to scan. Use it to review templates, emails, or embeds without scrolling through a single-line file.

1. Paste HTML: Add minified or messy markup from templates or emails.
2. Choose indentation: Select 2 or 4 spaces to match your style guide.
3. Get results: View formatted HTML instantly. Copy it or download as an .html file.

• Faster debugging: Spot missing closing tags or mis-nested elements quickly.
• Cleaner handoff: Share readable markup with designers or reviewers.
• Local privacy: All processing stays in your browser, keeping drafts and embeds private.

Use case 1: Email templates

Format complex table-based emails to trace structure and fix broken layouts.

Use case 2: Landing page snippets

Beautify embed codes before adding them to CMS widgets.

Use case 3: Code reviews

Hand reviewers tidy HTML with consistent spacing to speed approvals.

Basic example

Input: <div><h1>Title</h1><p>Hello</p></div>
Output:

<div>
  <h1>Title</h1>
  <p>Hello</p>
</div>

Advanced example

Input: Minified email template with nested tables
Output: Readable table structure with each row and cell on its own line.

Unclosed tags

If parsing fails, check for missing closing tags. The formatter will point to the first mismatch.

Invalid nesting

Block elements inside inline elements can trigger warnings. Reorder or wrap elements correctly.

• Keep 2-space indentation for compact snippets and 4-space for teaching or reviews.
• After formatting, validate accessibility attributes like alt and aria-label.
• Pair with the CSS formatter to tidy linked styles.

• Format XML with the XML formatter.
• Tidy JSON payloads using the JSON formatter.
• Compress for production after review with the JSON minifier (for JSON) or your build pipeline.

Formatting runs locally in your browser. No HTML content is uploaded or stored.