JSON Compare & Diff Tool
Compare two JSON objects side by side and instantly see the differences. Perfect...Compare two JSON objects side by side and instantly see the differences. Perfect for API testing, debugging, and configuration management.
Compare Features
Why Use JSON Compare & Diff Tool?
Deep Recursive Comparison
Compares nested objects and arrays at any depth, finding differences that simple text comparison would miss.
100% Private & Secure
All processing happens in your browser. Your JSON data never leaves your device or gets uploaded to any server.
Color-Coded Results
Green for added, red for removed, yellow for changed -- instantly understand what's different at a glance.
Flexible Input Format
Accepts both strict JSON and JavaScript object notation with unquoted keys, single quotes, and trailing commas.
Swap & Re-Compare
Quickly swap left and right panels to see the comparison from the other direction.
Dual View Modes
Switch between Diff View for detailed change lists and Tree View for side-by-side structure exploration.
Common Uses for JSON Compare
API Testing
Compare API responses between environments or versions to catch unexpected changes.
Config Management
Verify configuration changes before deployment by comparing old and new config files.
Code Review
Compare JSON data structures during code reviews to understand data model changes.
Database Migration
Validate data integrity by comparing JSON exports before and after migrations.
How It Works
Paste Your JSON Objects
Enter the original JSON in the left panel and the modified version in the right panel. Both standard JSON and JavaScript object notation are supported.
Click Compare JSON
The tool will analyze both objects and identify all differences including added, removed, and changed properties at any nesting level.
Review the Differences
View results in Diff View for a detailed list of changes, or switch to Tree View to explore both JSON structures side by side with collapsible nodes.
Tips & Best Practices
Use Sample Data First
Click Load Sample to see how the comparison works before pasting your own data.
Swap for Reverse View
Use the Swap button to quickly see which properties were added vs removed from the other perspective.
Array Comparison
Arrays are compared as whole values. If any element changes, the entire array is marked as changed.