- Paste JSON A and JSON B.
- Click Compare to generate the diff.
- Copy the diff output if needed.
JSON Diff Checker
Compare two JSON files and see exactly what changed.
How to Use This Tool
Learn More About JSON Diff Checker
Why compare JSON?
JSON diffing helps you confirm exactly which keys changed, were added, or removed. This is useful for API testing, configuration reviews, and debugging data pipelines.
About JSON Diff Checker
JSON diffing helps teams review changes between API responses, configuration files, or datasets. This tool compares two JSON inputs and returns a clear list of differences so you can validate updates quickly.
A fast, readable diff for JSON objects.
- Runs in browser
- Yes
- Private by default
- Yes
- Diff format
- Path-based
Examples
Diffing a changed field
Detect a value change and a new property.
Input
JSON A: {"active":true}
JSON B: {"active":false,"owner":"Sam"}Output
[{"path":"active","type":"changed",...},{"path":"owner","type":"added"...}]Features
Structured diff output
See additions, removals, and changes with precise paths.
Array-aware
Detect differences inside arrays and nested objects.
Client-side
All comparison happens in the browser for privacy.
Use Cases
- Review changes in API responses.
- Validate configuration updates before deployment.
- Compare data snapshots for debugging.
Frequently Asked Questions
Related Tools
Pair this with validators and formatters to clean inputs before comparison.