JSON Diff Checker
Compare two JSON objects or arrays and identify differences instantly. Get detailed reports on additions, deletions, and modifications.
Original JSON
Modified JSON
Advanced Comparison Features
Visual Comparison
Side-by-side comparison with color-coded highlighting for easy identification of changes.
Deep Comparison
Recursively compare nested objects and arrays with path-based difference tracking.
Detailed Reports
Generate comprehensive diff reports with statistics and downloadable summaries.
Easy Swapping
Quickly swap left and right JSON for different comparison perspectives.
Data Validation
Built-in JSON validation with detailed error messages for invalid syntax.
Real-time Analysis
Instant comparison results as you type, with live difference counting.
Perfect for Every Scenario
Development & Testing
- Compare API responses before and after changes
- Validate configuration file modifications
- Debug data transformation issues
- Review code generation outputs
Data Management
- Track changes in data migrations
- Compare database exports and backups
- Merge conflicting JSON documents
- Audit data synchronization processes
What Gets Compared
Detection Types
Added Properties
New keys or array elements in the modified version
Removed Properties
Keys or elements that exist in original but not in modified
Modified Values
Properties with different values between versions
Supported Structures
Nested Objects
Deep comparison of complex object hierarchies
Array Elements
Index-based comparison of array contents
Mixed Types
Handles arrays, objects, strings, numbers, and booleans
Comparison Tips & Best Practices
Getting Accurate Results
Valid JSON Only
Ensure both inputs are properly formatted JSON
Consistent Structure
Compare objects with similar overall structures for best results
Use Sample Data
Try the sample data to understand how the comparison works
Understanding Results
Path Notation
Changes show dot notation paths (e.g., "user.profile.name")
Array Indices
Array changes use bracket notation (e.g., "items[2]")
Filter Options
Toggle "Show Only Differences" to focus on changes
Frequently Asked Questions
How does the comparison algorithm work?
Our algorithm performs a deep recursive comparison, traversing nested objects and arrays to identify additions, deletions, and modifications at any level of nesting. Each change is tracked with its complete path for easy identification.
Can I compare arrays with different orders?
Currently, array comparison is index-based, meaning [1,2,3] and [3,2,1] will show differences. We're working on order-independent array comparison for future updates.
What happens with very large JSON files?
The tool can handle large JSON files, but performance depends on your browser and system resources. For very large files (>10MB), consider breaking them into smaller chunks for faster comparison.
Can I save or export the comparison results?
Yes! Use the "Download Report" button to save a comprehensive JSON report containing all differences, statistics, and metadata. Perfect for documentation or sharing with team members.
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