What is HTML Formatter?
HTML Formatter is a web-based code beautifier designed to format raw, minified, or disorganized HTML markup into a clean, properly indented document. Modern web applications, CMS platforms (like WordPress), and template engines often output single-line HTML or unevenly indented markup. Our HTML Formatter reorganizes HTML elements into a clean hierarchy, respecting block-level and inline elements while preserving text nodes, attributes, and comments.
How to use HTML Formatter
Paste your HTML source code into the editor. Click 'Format HTML' to apply standard indentation rules instantly. Choose between 2-space or 4-space tab depth from the toolbar. The tool indents nested tags, places block-level tags on new lines, and keeps inline elements clean. Copy the beautified HTML or download it as an .html file.
Key features
- Clean tag-level indentation for HTML5 documents
- Handles block-level tags, inline elements, and void self-closing tags correctly
- Configurable 2-space or 4-space indentation options
- Preserves HTML comments and doctype declarations
- Syntax color-highlighted output pane
- Instant copy to clipboard and .html file download
- 100% browser-based execution ensuring complete data privacy
Common use cases
- Formatting minified HTML pages retrieved from browser Page Source view for debugging
- Beautifying HTML email templates before sending marketing campaigns
- Standardizing markup structure across team frontend projects
- Formatting HTML snippets generated by rich-text WYSIWYG editors
- Preparing clean HTML code snippets for documentation
Technical details & standards
The HTML Formatter parses the HTML DOM structure, handling void tags (<meta>, <br>, <img>, <input>), HTML5 semantic elements (<header>, <nav>, <article>), inline styles, and embedded script blocks. All execution occurs client-side inside your browser JavaScript runtime, ensuring that your web templates and landing page markup remain completely confidential.
Frequently asked questions
Does the HTML Formatter alter attribute values?
No. Attribute names, values, and order are preserved exactly as written.
Can I format partial HTML snippets without doctype tags?
Yes! You can format any fragment—a single <div>, a component template, or a full page.
Is my data safe?
All processing happens entirely in your browser. Your data never leaves your device and is never sent to or stored on a server.
Does it work offline?
Yes. Once the page has loaded, most tools keep working without an internet connection.