Compare JSON Files and Data

Compare JSON in your browser. API payloads and configuration stay on your device.

Processed entirely in your browser. Never uploaded to a server.

BeforeAfter

Use JSON Diff to review API responses, environment configuration, localization files, or generated output. It compares object keys by name and arrays by position, then lists every addition, removal, and value change.

How JSON comparison works

Paste an earlier JSON document and a later one, then choose Compare JSON. The result path starts at $. A path like $.items[2].name means the third item in items has a changed name value.

When array order matters

Objects are unordered mappings, so key order does not create a difference. Arrays are ordered, so moving an item appears as changed positions. That is usually the right result for API payloads, but it is not a semantic, ID-based diff.

FAQ

Are my JSON files uploaded?

No. Both documents are parsed and compared in this browser tab. Kit-Bin never receives the JSON you paste or open.

Does key order matter?

No. Object keys are compared by name, not the order in which they appear. Array order does matter because an array represents an ordered list.

Can I compare nested JSON?

Yes. Every result includes a JSON-style path such as $.user.email or $.items[2], including nested objects and arrays.

Does this merge JSON files?

No. It is a read-only comparison tool. It shows additions, removals, and changed values, but does not choose or write a merged result.

Need to check structure rather than compare versions? Use JSON Schema Validator. Need to repair syntax? Use JSON Formatter and Validator.