JSON Diff Checker

Compare two JSON documents locally in your browser.

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About JSON Diff Checker
JSON Diff Checker compares two JSON documents side-by-side to highlight added, modified, or removed keys and values.
How to use JSON Diff Checker
  1. Paste the original JSON document into the left pane.
  2. Paste the updated JSON document into the right pane.
  3. Click Compare JSON to calculate structural and value differences.
  4. Review highlighted diff markers showing key additions, deletions, and edits.
Examples
Left: {"v":1,"status":"active"}
Right: {"v":2,"status":"active"}
Diff: Key "v" changed from 1 to 2.
FAQ
Does JSON Diff ignore key order when comparing?
You can enable key normalization so that objects with identical keys in different orders compare as equal.
Can I copy the diff summary?
Yes. You can copy the unified diff text or inspect visual comparisons.
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