Browser-based diff tool with visual highlighting - compare Python lists, JavaScript arrays, and more
🔒 100% Client-Side free array compare tool for JSON array compare online across all programming languages. Find array changes in Python lists, JavaScript arrays, PHP arrays, Ruby arrays, Go slices, and nested data structures with visual diff array comparison.
The most comprehensive JSON array compare online free tool for array changes detection across all programming languages. Compare arrays free including Python lists, JavaScript arrays, PHP arrays, Ruby arrays, Go slices, Java arrays, and more with visual diff array highlighting. Perfect for API response comparison, configuration diff analysis, and data migration testing.
Common Online Diff Tool Use Cases:
API Response DiffConfiguration DiffPython List DifferenceJavaScript Array DiffData Migration TestingCopy and paste your arrays (from any programming language) into the two input panels. Supports arrays with strings, numbers, objects, and nested arrays from Python, JavaScript, PHP, Ruby, Go, and more.
Click "Compare Arrays" to see the differences highlighted in real-time. Added elements are green, removed are red, and modified are yellow.
Review the detailed comparison results with element counts and visual indicators for each type of change.
Practical examples where array comparison saves developers time and prevents bugs across all programming languages.
Compare REST API responses before and after version updates to ensure backward compatibility.
Before: [{"id": 1, "name": "John"}] → After: [{"id": 1, "name": "John", "email": "john@example.com"}]Validate configuration arrays across different environments to prevent deployment issues.
Staging: [{"feature": "auth", "enabled": true}] vs Prod: [{"feature": "auth", "enabled": false}]Compare expected vs actual test results to identify failures and data inconsistencies.
Expected: [{"status": "success", "count": 5}] vs Actual: [{"status": "success", "count": 3}]Compare database query results before and after migration to ensure data integrity.
Old: [{"user_id": 1, "role": "admin"}] → New: [{"userId": 1, "permissions": ["read", "write"]}]Unlike server-based diff tools, our online diff tool processes everything in your browser. Your sensitive data never leaves your device, making it perfect for comparing proprietary API responses, configuration files, and confidential arrays from Python, JavaScript, PHP, Ruby, and more.
Get instant visual diff highlighting with color-coded differences. Our free diff tool highlights added (green), removed (red), and modified (yellow) elements, making it easy to spot changes in Python lists, JavaScript arrays, PHP arrays, Ruby arrays, Go slices, and nested structures.
Beyond simple list diff operations, our online diff tool performs deep comparison of nested arrays and objects. Find differences in multi-dimensional arrays, API response data, and complex data structures from Python, JavaScript, PHP, Ruby, Go, and more with semantic understanding of data types.
Built by developers for developers. Features include syntax highlighting, element indexing, keyboard shortcuts (Ctrl+L for sample data, Ctrl+Enter to compare), and mobile-responsive design for online diff operations on any device. Perfect for configuration diff analysis and merge conflict resolution.
Pure JavaScript implementation with no external libraries. Lightning-fast diff operations with optimized algorithms that handle large Python lists, JavaScript arrays, and datasets from any programming language efficiently. Client-side browser tool that works offline and loads instantly without any setup.
Supports various array formats from all programming languages including Python lists, JavaScript arrays, PHP arrays, mixed data types, nested structures, and complex objects. Perfect for API response comparison, configuration diff analysis, and database query results from Python, JavaScript, PHP, Ruby, Go, Java, C#, and more.
ArrayDiff supports JavaScript arrays containing strings, numbers, booleans, objects, nested arrays, and null values. JSON-formatted data is fully supported.
Yes! All comparison processing happens entirely in your browser. No data is sent to our servers, ensuring complete privacy and security.
ArrayDiff can handle large arrays efficiently. Performance depends on your device, but arrays with thousands of elements work smoothly.
Absolutely! ArrayDiff performs deep comparison of nested structures, highlighting differences at any level of nesting.
Our browser diff tool supports arrays from all programming languages including Python lists, JavaScript arrays, PHP arrays, Ruby arrays, Go slices, Java arrays, C# arrays, and any language that outputs JSON-formatted data structures.
Unlike server-based diff tools, our online diff tool processes all data locally in your browser. Your arrays and data never leave your device, making it perfect for comparing sensitive API responses, configuration files, and proprietary data structures.
Absolutely! Our diff tool is perfect for API response comparison. You can compare JSON arrays returned by different API endpoints, test API changes, validate data transformations, and ensure backward compatibility during API development.