JSON Diff Tool
Original JSON
Drop file to load
Processed locally in browser
What is the JSON Diff Tool?
The JSON Diff Tool is a secure, browser-based utility that compares two JSON objects or files and highlights the exact differences. Whether a value was added, removed, or modified, the tool makes it easy to spot changes in complex data structures.
Why use this tool?
Developers frequently need to compare API responses across different environments, review changes in configuration files, or debug state mutations. Using a local, browser-based diff tool ensures that sensitive data (like authentication tokens or PII) is never transmitted to an external server.
How to Use This Tool
- Paste your original JSON into the left panel.
- Paste the modified JSON into the right panel.
- The tool will automatically parse, sort, and highlight the differences.
Note: You can also use this tool to simply format and sort two JSON blobs side-by-side.
Frequently Asked Questions
How does the JSON diff tool work?▼
Our JSON Diff tool parses both the original and modified JSON documents, sorts their keys for accurate comparison, and highlights the structural and value differences between them.
Is my JSON data sent to a server?▼
No. All diffing operations occur directly in your browser. Your sensitive API keys, customer data, and proprietary structures never leave your local machine.
Why is it important to format JSON before diffing?▼
Unformatted or unordered JSON can cause false positives in diff results. Our tool automatically formats and sorts keys before comparing, ensuring you only see meaningful differences.