HTML Prettifier — Format Messy Markup Instantly [2026]
Paste minified or messy HTML → get clean, indented output in one click. Handles nested tags, void elements, and inline styles. Configurable indent size. 100% browser-based.
What is HTML Prettifier?
How to Use HTML Prettifier
Paste your messy HTML code into the input area on the left. Select your preferred indentation size (2 or 4 spaces). The tool formats the HTML with proper indentation, handling nested elements, self-closing tags, and attributes. Copy the prettified HTML with one click.
How HTML Prettifier Works
Common Use Cases
- Formatting minified HTML for debugging and inspection
- Beautifying HTML output from CMS or WYSIWYG editors
- Making HTML templates readable for code review
- Formatting HTML email templates for editing
- Cleaning up HTML before adding it to documentation
Frequently Asked Questions
Does the prettifier change how the HTML renders?▼
In most cases, no. The prettifier adds whitespace for readability but does not change the HTML structure. However, in rare cases where whitespace is significant (e.g., inside <pre> tags), the formatting may affect rendering.
Can it handle self-closing tags like <br> and <img>?▼
Yes. The prettifier recognizes all standard HTML void elements (br, hr, img, input, meta, link, etc.) and handles them correctly without expecting closing tags.
What indentation sizes are available?▼
You can choose between 2 spaces and 4 spaces for indentation. The default is 2 spaces.
Is my HTML data sent to a server?▼
No. All formatting happens entirely in your browser using JavaScript. Your HTML code never leaves your machine.
Can it format HTML with inline CSS and JavaScript?▼
Yes. The prettifier handles HTML with inline styles and script tags. The HTML structure is formatted while the content inside style and script tags is preserved as-is.