Advanced JSON Compare, Merge & Patch Tool

JSON Compare is an online tool that analyzes and highlights differences between two JSON documents. It parses both JSON structures, performs a deep comparison of all nested objects and arrays, and displays the differences in an easy-to-understand visual format. The tool works entirely in your browser using advanced diff algorithms.

Yes! Our JSON compare tool uses Monaco Editor (the same engine that powers VS Code) which efficiently handles large JSON files up to several megabytes. The tool uses virtual scrolling and lazy loading to ensure smooth performance even with complex nested structures.

The tool detects all types of changes including: added properties, removed properties, modified values, type changes, array modifications, nested object changes, and structural differences. It also supports various comparison modes like ignoring array order, case sensitivity, and whitespace.

Absolutely! All JSON processing happens locally in your browser. No data is sent to our servers or stored anywhere. Your sensitive data, API keys, and confidential information remain completely private and secure on your device.

Yes! The tool automatically handles different formatting styles. Whether your JSON is minified, prettified, or has different indentation, the comparison focuses on the actual data structure and values, not the formatting.

The tool uses color coding: green for additions, red for deletions, and yellow/amber for modifications. In side-by-side view, you can see both versions with changes highlighted. The inline view shows a unified diff with change indicators.

Yes, you can copy the diff report to clipboard or download it as a text file. The report includes detailed statistics, all changes with their paths, and comparison settings used.

While the primary focus is comparison, the tool includes built-in JSON syntax validation. It will highlight syntax errors, trailing commas, and other JSON format issues in real-time.

Our enhanced JSON Compare tool includes visual merge capabilities that allow you to combine changes from two JSON documents. The tool intelligently merges structures, and you can review the merged result in a dedicated panel. Perfect for combining configuration files or API responses.

JSON Patch (RFC 6902) is a standard format for describing changes to a JSON document. Our tool can export the differences between your JSON documents as a JSON Patch document, which can be used programmatically to apply the same changes to other JSON documents. This is especially useful for API development and configuration management.