Free
$0
- All five utilities
- Unlimited basic use
- Local browser processing
API utilities for developers and IT professionals
JSON Compare Online — Free JSON Diff Tool
Compare two JSON files or payloads online for free. Find added, removed, and changed values in nested JSON with clear object paths.
Most processing happens locally in your browser.
GET /v1/users/42
{
"id": 42,
"name": "Arnaldo",
"plan": "pro",
"status": "active"
}Workspace
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JSON Compare
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How to use JSON Compare Online — Free JSON Diff Tool
Paste the original JSON on one side and the updated payload on the other. API Toolbox compares the structures and reports values that were added, removed, or changed using JSON-style paths.
The JSON diff tool works with nested objects and arrays, making it useful when a payload is too large to compare manually. You can quickly identify which field changed instead of reading two documents line by line.
Common uses include comparing API responses between environments, reviewing configuration changes, checking webhook payloads, validating data migrations, troubleshooting integrations, and examining changes between API versions.
Before comparing malformed data, use the JSON Formatter to validate and beautify each payload. You can also use the REST API Tester to retrieve fresh responses and then compare the results here.
Can I compare two JSON payloads online?
Yes. Paste the original and updated JSON payloads into the comparison workspace to identify their differences.
Can it compare nested JSON?
Yes. The comparison walks nested objects and arrays and reports the path of each detected difference.
What differences does the JSON diff show?
The tool identifies added values, removed values, and values that changed between the two JSON structures.
Why compare JSON payloads?
JSON comparison can help troubleshoot API responses, configuration changes, webhooks, migrations, and differences between development, test, and production data.