Indent:
Beautify, indent, format, and validate HTML5 markup with clean tag nesting, attribute formatting, and minification controls.
Format with 2 spaces, 4 spaces, or tabs with consistent element nesting.
Standardizes tag casing, self-closing tags, and attribute spacing.
Strip whitespace and comments to compress HTML payload size for production deployment.
Format private application source code and marketing templates with 100% confidentiality.
The HTML Formatter tokenizes raw HTML markup into elements, attributes, text nodes, and comments using a client-side HTML lexer.
It applies indentation rules based on element display types (block elements vs inline elements), aligning attributes and preserving preformatted <pre> and <code> content.
The formatted code is rendered with syntax highlighting in a high-speed in-browser code viewer.
Paste unreadable single-line HTML from "View Page Source" for clean, readable inspection.
Organize deep nested table structures in email newsletters before dispatch.
Clean HTML code snippets before embedding them into documentation and tutorials.
Identify unclosed div and section tags by inspecting clean visual indentation.
No. Content inside <pre>, <code>, <textarea>, and <script> tags is preserved with original spacing intact.
Yes. Simply paste the minified HTML and click "Beautify" to reconstruct clean indentations instantly.
No. All parsing and formatting occur 100% locally in your browser memory.
Yes. Switch to "Minify" mode to remove all unnecessary whitespace, line breaks, and comments.
Yes. Full support for <main>, <nav>, <header>, <article>, <section>, and custom web components.
No. Only whitespace and structural indentation are normalized; all tags, attributes, and text contents remain intact.