JSON Diff Tool
Compare two JSON objects side by side and highlight added, removed, and changed keys.
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How do you like this tool?
How to use
Paste original JSON
Enter or paste the original JSON data in the left input area.
Paste modified JSON
Enter or paste the modified JSON data in the right input area.
Compare and review
Click Compare to see all differences highlighted with color coding: green for added, red for removed, yellow for changed.
Use cases
API Version Comparison
"Compare API responses between versions to identify schema changes."
Config Change Review
"Review changes between two versions of a JSON configuration file."
Data Migration Validation
"Verify that data transformations produce the expected output by comparing before and after."
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Frequently Asked Questions
?How does the JSON comparison work?
The tool performs a deep recursive comparison of both JSON structures. It walks through every key and nested object to identify differences at every level, showing the exact path where each change occurs.
?What types of differences are detected?
Three types: Added keys (present in modified but not original), Removed keys (present in original but not modified), and Changed values (same key exists in both but with different values).
?Does it handle nested JSON objects?
Yes, the tool recursively compares nested objects and arrays, showing the full path to each difference (e.g., 'user.address.city').
?Is my data kept private?
Yes, all comparison happens entirely in your browser. Your JSON data is never sent to any server, ensuring complete privacy.
?Can I compare JSON arrays?
Yes, the tool supports comparing arrays, objects, and any valid JSON values. Array elements are compared by index position.