Question 1

How do I validate JSON against a schema?

Accepted Answer

Paste your JSON data in the left editor and your JSON Schema in the right editor, then click Validate. The tool checks every constraint in the schema and reports all validation errors with their exact paths.

Question 2

What schema features are supported?

Accepted Answer

The validator supports all JSON Schema Draft 2020-12 features including type checking, required fields, pattern matching, minimum/maximum constraints, array item validation, allOf/anyOf/oneOf combinators, and $ref references.

Question 3

What do the validation errors mean?

Accepted Answer

Each error shows the data path (where the error is), the schema path (which rule failed), and a human-readable message explaining what went wrong. For example: /users/0/email must match format "email".

Question 4

Can I validate API request bodies with this tool?

Accepted Answer

Yes. If you have an OpenAPI/Swagger spec, extract the relevant schema definition, paste it in the Schema editor, then paste a sample request body in the JSON editor to verify it meets all requirements.

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