HTML/XML Formatter Online
The best free HTML formatter and beautifier. Perfectly indent XML and HTML markup instantly for better readability and debugging.
Minified / Messy Code
Beautified Output
Built With Care
“The formatter splits the source at every tag boundary, increases indentation after opening tags, decreases it before closing tags, and skips void elements such as img, input, br, and hr so they stay on one line. It changes whitespace only, so the output renders identically to the input.”
HTML/XML Formatter
Paste minified or messy HTML and XML and get back clean, indented, readable markup in one click. This HTML beautifier uses a consistent four-space indent, leaves void elements like img and br on a single line, and never uploads your code.
- 1Copy the unformatted, minified, or messy HTML or XML from your source file.
- 2Paste the code into the left editor panel labeled Minified / Messy Code.
- 3Click Beautify Markup Now to run the indentation pass.
- 4Review the cleaned, indented output in the right-hand panel, scrolling if the document is long.
- 5Use the copy button to grab the formatted markup.
- 6Paste the result back into your development environment.
- 7Expect one token per line: the formatter breaks every tag and text run onto its own line, including comments, doctypes, and processing instructions.
- 8For multi-megabyte inputs the pass runs synchronously, so the button response may pause briefly on very large documents.
- Smart Nesting Detection: Tracks tag depth to apply one four-space indent level per nested element.
- Void Element Handling: Keeps img, input, br, and hr tags on their own line without opening a new indent level.
- XML Compatible: Handles sitemaps, manifests, and SOAP documents that follow the same tag structure.
- CRLF Line Endings: Output uses standard Windows-style line breaks for broad editor compatibility.
- Local Processing: Formatting happens in your browser.
- Instant Preview: The beautified result appears in a scrollable terminal-style panel.
- Special Token Handling: Comments, doctypes, and processing instructions such as are matched as whole tokens and kept on their own lines.
HTML/XML Formatter Specs
Limits
- HTML and XML input
- Formatting preserves tag content
Formats
- Output: indented HTML/XML, minified variant
Defaults
- 2-space indent
- Attribute per line off
How it works
- Client-side tokenizer-based formatter
Honest caveats
- Inline scripts/styles are re-indented but not reformatted
- Doctype preserved
Real Ways People Use This
Code Reviews
Run generated or minified HTML through the formatter before pushing so teammates can actually read the diff instead of one long line.
Email Templates
Beautify HTML email source so you can edit tables, inline styles, and content without losing your place.
XML Config Files
Indent sitemaps, RSS feeds, Android manifests, and SOAP payloads that often ship minified by default.
Scraping and API Output
Format raw HTML returned by scrapers or server responses to inspect the structure before parsing it programmatically.
Teaching Markup
Use the indented output to show students how nesting and hierarchy work in real HTML and XML documents.
CMS Source Audits
Beautify HTML copied out of a WYSIWYG editor to inspect inline styles, class names, and structure before cleanup.
SVG and Inline Component Markup
Format SVG markup exported from design tools before inlining it into components, keeping every nested element readable.
- The formatter restructures whitespace only; it will not repair broken, unclosed, or mismatched tags.
- Malformed minified code can produce uneven indentation, so validate the markup separately when syntax errors are suspected.
- Extremely large files, several megabytes or more, may briefly slow the browser during the formatting pass.
- 1Compare the first and last lines of the output to confirm opening and closing tags are balanced.
- 2Check deeply nested sections to verify each level has the expected indentation.
- 3Run the output through a validator or render it once before committing.