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Check the contract.
Before the request runs.

Validate a JSON value against a practical JSON Schema subset in your browser. See the exact paths that fail without sending fixtures or API payloads to a server.

JSON Schema validator

JSON data
JSON Schema

Supported keywords: type, required, properties, items, enum, minLength, maxLength, minimum, and maximum. This is a transparent local subset, not a full replacement for every JSON Schema draft or AJV.

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QUICK ANSWERS
Is my data uploaded?

No. Both JSON documents are parsed and checked in this browser tab.

Does this support every JSON Schema feature?

No. The page deliberately lists its supported subset so you can tell when a full draft implementation is required.