JSON Diff Online

The tool performs a structural comparison: it parses both documents and compares them key by key and value by value, instead of comparing raw text line by line. This means formatting differences like indentation do not show up as changes.

No. JSON objects are unordered, so {"a":1,"b":2} and {"b":2,"a":1} are reported as identical. Array order does matter, because arrays are ordered by definition.

No. The comparison runs entirely in your browser, so you can safely diff API responses or configuration files that contain sensitive values.

Added values are highlighted in green, removed values in red, and modified values show both the old and the new value so you can see exactly what changed.