How to Compare Two JSON Objects with JSON Diff
Step-by-step guide to spotting added, removed, and changed keys between two JSON documents using the DevHexLab JSON Diff tool.
Tool Used
JSON Diff
Open the JSON Diff tool
Navigate to /tools/json/json-diff.
Paste your first JSON into the left panel
Click in the left editor and paste the original or 'before' JSON. The panel accepts any valid JSON object or array.
Paste your second JSON into the right panel
Click in the right editor and paste the updated or 'after' JSON. Both panels support syntax highlighting and will show a red border if the content is invalid JSON.
Read the diff results
The tool highlights keys in green (added), red (removed), and yellow (changed). Nested changes are shown inline so you can see exactly what changed at every level of the structure.
Copy or share the result
Use the Copy button to copy the diff output, or share the URL if the tool supports URL-encoded state, so teammates can review the same comparison.
All done!
You are ready to use JSON Diff like a pro.