XML Diff Online
Compare XML files side by side and highlight every structural change.
What Is XML Diff?
XML Diff is a free online tool that compares two XML documents and highlights every addition, deletion, and modification. It includes an optional Pretty-Print mode that normalizes indentation before diffing, so you see meaningful structural changes rather than formatting noise. It is ideal for comparing API responses, configuration files, Maven POMs, Spring beans, SVG files, and any other XML-based documents.
How to Use XML Diff
- Paste your original XML into the left panel.
- Paste the modified XML into the right panel.
- Enable Pretty-Print to normalize indentation before comparing (recommended).
- Click Compare to see the highlighted differences.
- Use Split or Unified view to review the changes.
Features
- Line-by-line XML element comparison
- Pretty-Print normalization before diffing
- Split and Unified diff views
- Works with HTML, SVG, and other XML-derived formats
- Added / removed line counters
- Copy diff result to clipboard
FAQ
What is the Pretty-Print option?
Pretty-Print normalizes indentation before comparing, so you see only meaningful structural changes rather than whitespace differences.
Can XML Diff handle HTML files?
Yes. XML Diff compares any tag-based markup as plain text, including HTML, SVG, and other XML-derived formats.
Is my XML data sent to a server?
No. DiffCheck runs entirely in your browser. Your XML data never leaves your device.
Does XML Diff validate XML syntax?
The tool performs a best-effort pretty-print and line-by-line diff. It does not perform strict XML schema validation.