Use HTML Formatter online for free. No installation, no signup — works directly in your browser.
100% free, no signup required. Works entirely in your browser.
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The formatter follows widely accepted HTML coding conventions including proper indentation of nested elements, consistent attribute quoting, and self-closing tag handling. You can customize the indentation size (2 or 4 spaces), choose between single and double quotes for attributes, and control line width for optimal readability in your editor.
Yes, the formatter validates HTML syntax and reports common errors like unclosed tags, mismatched nesting, missing required attributes, and invalid element placement. This helps catch issues that browsers silently fix but may cause unexpected rendering behavior across different browsers and devices.
Yes, you can adjust indentation size, choose tab or space indentation, set maximum line width, configure attribute formatting (inline vs. multi-line), and control void element handling. These options let you match your project's specific style guide or team conventions perfectly.
