Diff lab

Compare & diff JSON

Paste two JSON documents to see a side-by-side diff with clear highlights. Then ask Codeground AI for a one-paragraph summary of what changed.

Privacy: Comparison runs in your browser. The optional AI summary uses Codeground's self-hosted model and is not stored.

Original JSON

Modified JSON

Online JSON diff for developers

API testing, config reviews, and fixture debugging all come down to the same question: what changed? Paste original and modified JSON to get a semantic side-by-side diff — missing keys, type mismatches, and unequal values are highlighted. When you need the story in plain English, hit AI summarize changes for a concise paragraph.

What we highlight

  • Missing properties: keys present on one side but not the other.
  • Type mismatches: e.g. a string where a number used to be.
  • Unequal values: same path, different content.