JSON Diff

Compare two JSON objects and see differences.

Developer

Paste two JSON objects (e.g. two API responses or config files) to see what changed. Differences are highlighted. Runs in your browser.

About JSON Diff

This tool compares two JSON values (objects or arrays) and lists the differences: keys only in A, keys only in B, and keys with different values. Useful for comparing API responses, configs, or any two JSON structures. Nested objects are compared recursively.

How to use

  1. Paste the first JSON in the left box and the second in the right box.
  2. Click Compare JSON. The differences appear below.

Frequently Asked Questions

How are differences shown?
Keys or values that differ are highlighted. Missing keys in one side, or different values for the same key, are listed. The view is unified so you can scan quickly.
Is my JSON sent to a server?
No. Both JSONs are parsed and compared in your browser. Nothing is uploaded.
Does key order matter?
No. Objects are compared by key names and values. Order of keys does not affect the diff.