Are There Any Free Xml Diff/Merge Tools Available?


Answer :

Have a look at at File comparison tools, from which I am using WinMerge. It has an ability to compare XML documents (you may wish to enable DisplayXMLFiles prefilter).

DisplayXMLFiles.dll - This plugin pretty-prints XML files nicely by inserting tabs and line breaks. This is useful for XML files that do not have line returns in convenient locations.

WinMerge in action

See also my feature comparison table.


I wrote and released a Windows application that specifically solves the problem of comparing and merging XML files.

Project: Merge can perform two and three way comparisons and merges of any XML file (where two of the files are considered to be independent revisions of a common base file). You can instruct it to identify elements within the input files by attribute values, or the content of child elements, among other things.

It is fully controllable via the command line and can also generate text reports containing the differences between the files.

Project: Merge merging three XML files


There are a few Java-based XML diff and merge tools listed here:

Open Source XML Diff written in Java

Added links:

  • diffmk
  • VMTools
  • OpenSHORE XML Merger
  • xxdiff

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