JSON Compare
Compare two JSON objects side by side. Find added, removed, and modified keys instantly.
Compare JSON
No data to compare
Enter two JSON objects above and click Compare
What this tool does not do
- Large objects may cause performance issues.
- Only checks structural equality (not order-sensitive for arrays).
- Does not handle circular references.
How It Works
Paste two JSON objects
Enter or paste your JSON data into the two input areas — JSON A (original) and JSON B (modified).
Click Compare
Press the Compare button to analyze the differences between the two JSON objects instantly.
Review differences
View added, removed, and modified keys with color-coded entries and detailed statistics.
Frequently Asked Questions
How does JSON comparison work?
The tool recursively compares all keys and values in both JSON objects. It detects added, removed, and modified entries by traversing the object tree structure.
Is my data uploaded?
No. All processing happens entirely in your browser using JavaScript. Your JSON data never leaves your device.
What types of differences can it detect?
The tool can detect three types of differences: added keys (present in JSON B but not in JSON A), removed keys (present in JSON A but not in JSON B), and modified keys (present in both but with different values).