JSON Schema Validator

Validate any JSON document against a JSON Schema (draft 2020-12 or draft-07). Each violation reports the JSON path, the expected constraint, and what was found. Useful for sanity-checking an API response against the schema, or for verifying that an LLM's structured output matches its declared schema.

How to use the JSON Schema Validator

Paste the schema on the left, the data on the right, click Validate. Errors list the JSON path of each violation (using the standard /property/0/field JSON Pointer notation that Ajv and other validators use).