JSON Diff
Compare two JSON documents and highlight the differences.
Processed locally in your browser. Nothing you enter is uploaded or stored.
Overview
Compares two JSON documents by formatting both consistently and diffing them line by line — useful for spotting what changed between two API responses or config versions.
How to use it
- 1Paste the original JSON on the left.
- 2Paste the changed JSON on the right.
- 3Both are parsed, re-formatted identically and diffed so unrelated whitespace or key-order changes don't create noise.
Tips
- Because both sides are re-serialized before diffing, differences in formatting or key order alone won't show up as changes — only actual value/structure differences will.