JSON Diff
Compare two JSON objects and see what was added, removed, or changed.
Visual Diff
See added keys in green, removed keys in red, and changed values in yellow with a clear tree view of your JSON structure.
Nested Support
Deep comparison of nested objects and arrays with expand/collapse navigation for exploring complex JSON structures.
Quick Summary
Get instant statistics on total changes, additions, removals, and modifications. Copy the diff summary with one click.
How to Use JSON Diff Viewer
The JSON Diff Viewer highlights the exact differences between two JSON documents in a clear, side-by-side comparison. All processing happens locally in your browser, so sensitive configuration or API data never leaves your device. This tool is invaluable for debugging, code review, and configuration management.
Open the JSON Diff Tool
Navigate to the JSON Diff Viewer from the developer tools section. The tool runs entirely client-side, meaning your data remains private and is never transmitted to any server.
Enter the First JSON Document
Paste or upload your original JSON document into the left input panel. This serves as the baseline against which the second document will be compared for additions, deletions, and modifications.
Enter the Second JSON Document
Paste or upload the modified JSON document into the right input panel. The tool will compare both documents key by key and value by value to identify every difference.
Review the Highlighted Differences
Examine the color-coded output showing added properties in green, removed properties in red, and changed values in yellow. Navigate through each difference to understand exactly what changed.
Export or Share Results
Copy the diff output or download the comparison report for documentation purposes. Use the results in code reviews, pull request descriptions, or change logs.
Common Use Cases
API Version Comparison
Compare API responses across different versions to document breaking changes, new fields, or deprecated properties before upgrading client integrations.
Configuration Debugging
Identify discrepancies between development, staging, and production configuration files to quickly find the root cause of environment-specific bugs.
Code Review Assistance
Compare JSON fixtures, mock data, or schema definitions in pull requests to ensure changes are intentional and complete.
Data Validation
Verify that data transformation pipelines produce the expected output by comparing input and output JSON documents side by side.
Pro Tips
- -Format both JSON documents before comparing to ensure differences are structural rather than cosmetic whitespace changes.
- -Use the tool to verify API response changes between versions so you can update client code accordingly.
- -Compare environment configuration files side by side to catch unintended differences before deployment.
- -Collapse unchanged sections to focus only on the parts of the document that have actually been modified.
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