JSON Diff & Merge
Compare two JSON files and instantly see the differences. This JSON Diff tool helps developers debug APIs, track data changes, and understand how JSON structures evolve.
JSON A
JSON B
Compare JSON objects visually — toggle between inline and side-by-side diff
What Is JSON Diff?
JSON Diff is the process of comparing two JSON documents to identify differences between them. These differences may include added keys, removed values, modified properties, or structural changes in nested objects and arrays.
Developers commonly use JSON diff tools when working with APIs, configuration files, logs, or application state. Comparing JSON manually is difficult and error-prone, especially for large or deeply nested structures. A visual JSON Diff tool makes this process fast and reliable.
How the JSON Diff Tool Works
- Paste or upload the original JSON on the left side.
- Paste or upload the modified JSON on the right side.
- The tool analyzes both JSON structures.
- Differences are highlighted visually.
The comparison is performed client-side whenever possible, ensuring fast performance and keeping your data private. No JSON content is stored unless explicitly stated.
Common Use Cases for JSON Diff
- Comparing API responses between versions
- Debugging unexpected data changes
- Reviewing configuration updates
- Tracking changes in application state
- Validating data migrations
Why Use This JSON Diff Tool?
This JSON Diff tool is designed specifically for developers who need clarity and precision. It supports deeply nested objects, arrays, and complex data structures without requiring manual inspection.
Unlike basic text diff tools, JSON Diff understands JSON structure, making it easier to identify meaningful changes rather than superficial formatting differences.
JSON Diff & Merge FAQs
What does a JSON Diff tool do?
A JSON Diff tool compares two JSON documents and highlights the differences in keys, values, and structure.
Is this JSON Diff tool free?
Yes. The JSON Diff tool is free to use for standard comparisons.
Is my JSON data safe?
Yes. All comparisons happen locally in your browser whenever possible. Your data is not stored.
Does it support large JSON files?
Large JSON files are supported with optimized processing. Extremely large files may require Pro features.
Can I merge JSON after comparing?
Yes. JSON Diff is often used together with JSON Merge to resolve differences and combine changes.