HTML Prettifier & Minifier
Format messy HTML with proper indentation or minify it to reduce size. Supports 2-space, 4-space, and tab indentation options.
About HTML Prettifier & Minifier
The HTML Prettifier and Minifier is a free browser-based tool for cleaning up HTML markup. Whether you have a single line of minified HTML that you need to read, or a messy file with inconsistent indentation that needs tidying, this tool handles both directions.
The prettify function parses your HTML and rebuilds the indentation based on tag nesting. Each opening tag increases the indentation level, and each closing tag decreases it. You can choose your preferred indent style: 2 spaces, 4 spaces, or tabs. The result is consistently formatted markup that is easy to scan and edit.
The minify function does the opposite, stripping unnecessary whitespace and newlines from your HTML to produce the smallest possible output. This is useful for reducing page weight, preparing HTML for inline embedding, or cleaning up HTML before inserting it into a CMS or email template.
After each operation, the tool displays both the original and output sizes in bytes, giving you immediate feedback on the impact of formatting or minification. This helps you understand the trade-off between readability and file size.
All processing runs entirely in your browser with no server communication. Your HTML is never uploaded or stored anywhere, making this tool safe for working with proprietary templates, client projects, or any markup that should remain private. Paste your HTML, choose an operation, and copy the clean result.
Frequently Asked Questions
How does the HTML prettifier handle indentation?
The prettifier parses the HTML and adds consistent indentation based on nesting depth. You can choose between 2 spaces, 4 spaces, or tabs to match your project's code style. Each opening tag increases the indent level, and each closing tag decreases it, producing clean, readable markup.
Does the minifier affect how the HTML renders in the browser?
No. HTML minification only removes whitespace between tags that is not significant for rendering. The visual appearance of the page remains identical. However, whitespace inside pre and textarea elements is preserved since it is semantically meaningful in those contexts.
Can this tool fix broken HTML?
This tool formats the indentation and whitespace of your HTML but does not attempt to fix structural errors such as unclosed tags or mismatched elements. For best results, ensure your HTML is well-formed before formatting. The tool processes the markup as-is and focuses on visual presentation of the code.
Is there a size limit for the HTML input?
All processing happens in your browser, so the practical limit depends on your device's memory and processing power. The tool comfortably handles HTML documents of several hundred kilobytes. For extremely large files exceeding a few megabytes, a command-line tool may be more appropriate.