The JSON diff tool lets you compare two JSON documents side by side and instantly highlights added, removed, and changed fields. No installation, no registration — paste your JSON and see the diff in real time.

Perfect for comparing API responses, reviewing config file changes, debugging data transformations, or reviewing what changed between two versions of a JSON payload.

Use cases for JSON comparison

Compare API response before and after a deployment to catch breaking changes
Review differences in package.json, tsconfig.json, or other config files
Debug data pipeline transformations by comparing input and output JSON
Review changes to database records stored as JSON documents
Diff Postman collection exports or OpenAPI spec files

How JSON diff works

Both JSON inputs are parsed and deeply traversed. Each key path is compared recursively. Added keys are shown in green, removed keys in red, and modified values in yellow. Nested objects and arrays are diffed at every level.

FAQ

Does key order matter in JSON diff?

No — the tool compares by key name, not position. Two objects with the same keys in different order are considered identical.

Can I compare nested JSON arrays?

Yes. Arrays are compared element-by-element by index. For unordered array comparison, sort your arrays before pasting.