How it works
- Paste, type, or open both versions from your device.
- Choose the precision and cleanup options that fit your content.
- Review additions and removals side-by-side or as a unified diff.
Useful features
- Safe XML validation with line and column errors
- Attribute-order normalization
- Optional formatting-whitespace cleanup
- Element order, mixed content, and text-value preservation
Common uses
- Checking configuration files across environments
- Comparing SOAP or integration payloads
- Reviewing data exports and application configuration
Tips for a cleaner comparison
- Keep formatting whitespace ignored for minified-versus-pretty XML.
- Review element-order changes carefully because order is preserved.
- External entities and referenced resources are never fetched.
How to compare XML files online
Paste or open the two XML files, then compare them after validation. ComparLab normalizes attribute order and can remove indentation-only whitespace, which prevents equivalent documents from appearing different just because they were formatted by different systems.
Element names, text values, attributes, and element order remain meaningful. Numeric-looking text is kept as text, so identifiers such as 00123 do not lose leading zeros. Use the highlighted result to review configuration changes, integration payloads, feeds, and exported data without sending the XML to a server.
Minified XML versus formatted XML
A minified document and a pretty-printed document may contain the same structure. Leave formatting-whitespace cleanup enabled for this comparison. Turn it off only when whitespace inside the XML content is significant to the receiving application.
Related comparison tools
Frequently asked questions
Does XML indentation count as a change?＋
Not when Ignore formatting whitespace is on, which is the default.
Does attribute order count?＋
No. Attributes are normalized so equivalent orderings do not create false changes.
Can XML load external entities?＋
No. ComparLab does not resolve external resources or execute XML content.
Choose the comparison that matches your data
Use Text Compare or Code Compare when every character and line should remain visible. Choose JSON, XML, or YAML when you want validation plus format-aware normalization, and use List Compare when the question is which values are missing, shared, or repeated. Selecting the matching tool helps remove harmless formatting noise without hiding meaningful changes.