DeltaJSON is a REST API that takes two or more JSON files, analyses their structure and then compares these files to identify the differences between them, returning the results in JSON or XML format.
Its algorithms work through the JSON files, analyzing their structure and matching up all the corresponding elements between them. DeltaJSON identifies all of the differences in your content according to various options you can specify. It then returns them in a format which combines your original content with new metadata detailing the changes.