JSON Diff — compare two JSON files

Paste, upload, or drop JSON into each side and get a clean, color-coded, side-by-side diff. No sign-up, no upload to a server — We never see your data: everything runs in your browser.

Original
Changed

How it works

  1. Put your baseline JSON in Original and the new version in Changed — drag-drop a file, use the Upload button, or paste the raw text.
  2. As soon as both sides are valid JSON, a side-by-side diff appears with additions in green and removals in red.
  3. Edit either side directly in the diff to refine it, or use Swap sides to reverse the comparison.

Comparing Jupyter notebooks? Use the notebook-aware diff. Or open the JSON viewer.