HTML Formatter
ConverterFormat and beautify HTML code with proper indentation. Supports DOCTYPE, void elements, raw text elements. Beautify or minify. Checks tag nesting Checks tag.
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About HTML Formatter
Format and beautify HTML code in your browser with configurable indentation (2, 4, 6, or 8 spaces).Uses the browser's native DOMParser to correctly parse HTML and reformat it with proper nesting — handles void elements like `<br>`, `<img>`, `<input>` (keeps them self-closing), raw text elements like `<script>` and `<style>` (preserves their content), and custom elements or web components. Attributes are sorted alphabetically for consistency. Toggle between beautify mode (indented, readable output) and minify mode (compact single-line output).Ideal for cleaning up templated output, debugging malformed HTML, or standardizing code before code review. For example, a minified one-line HTML blob is re-indented into a readable hierarchy with tags paired, easier to maintain. After formatting, review becomes clearer — tag nesting and missing closures jump out immediately.
How to Use
- Open the HTML Formatter tool
- Select the source and target formats
- Adjust the output options as needed
- Click the Convert button; results appear in real time
- Copy or export the result
Use Cases
- Tag nesting inspection — Expand minified or generated HTML into indented hierarchy to spot missing closing tags and broken nesting.
- Template cleanup — Format HTML templates to make tag structure clear and improve maintainability.
- Code review — Format HTML before code review to make diffs clearer and more focused.
- Debug layouts — Expand one-line HTML from templates or server rendering to inspect nesting and closure issues.
- Minify for release — Compress HTML to a single line, removing whitespace to shrink delivery size.
FAQ
Does formatting affect HTML functionality?
No. Formatting only adjusts indentation and line breaks. HTML structure, attributes, and functionality remain unchanged.
Does it support HTML5?
Yes. DOMParser supports HTML5 tags, custom elements, SVG, and more.
Is my pasted HTML leaked or stored?
No. Formatting is done entirely in your local browser via DOMParser, with no network requests made during processing. Your HTML never leaves your device and is neither saved nor uploaded.
Will script or style content be reformatted?
No. These are raw-text elements; their inner content stays untouched to avoid breaking JS or CSS semantics.
Can it fix broken tag nesting?
DOMParser applies browser rules to auto-correct tag pairing and re-emits the hierarchy, so many common nesting errors are fixed after formatting.
Does it support minification?
Yes. Switching to minify mode removes indentation, excess whitespace and newlines to produce compact single-line HTML for production builds.