JSON Schema validator

Check JSON against a draft-07 schema.

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JSON Schema validator processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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JSON input

Draft-07 JSON Schema

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Updated 2026-09-20

JSON Schema validator explained

Validate a JSON value against your draft-07 schema with the bundled Ajv 8.17.1 validator. Results list each failing JSON Pointer path, schema keyword and correction clue. The input is not coerced or filled with defaults.

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A worked example

With age declared as an integer with minimum 0, age: -1 fails the minimum check and age: "32" fails the type check.

Before you use the result

Draft-07 only, local references only. Format is treated as an annotation, so email, date and URL formats are not checked. The worker is bounded; a very complex schema may time out. Duplicate keys and unsafe large integers are rejected.

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ToolOctopus. “JSON Schema validator.” Updated 2026-09-20. https://tooloctopus.com/json-schema-validator.

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