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JSON Diff Checker: Compare Two JSON Files

Compare two JSON documents and see every added, removed, and changed key or value, validated and diffed in your browser.

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Privacy Notice: All files and input data are processed 100% locally inside your browser. No files are uploaded to our servers.

How to Use:

  1. Paste the first JSON document into JSON A and the second into JSON B.
  2. Click Compare; both documents are validated before comparing.
  3. Review the added, removed, and changed keys and values, listed by their full path.

Key Features:

  • Validates both JSON documents before comparing them
  • Highlights added, removed, and changed keys and values separately
  • Reports the full path to each difference, including inside nested objects and arrays
  • Runs entirely in your browser with no external requests

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