JSON Schema Validator

Check JSON documents against a JSON Schema locally

Validate JSON against JSON Schema (draft-07) — paste schema and instance, get errors instantly in-browser.

Also known as: jsonschema validator · validate against schema · json schema lint

100% In-Browser & Private — your data never leaves this device
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How to use the JSON Schema Validator

  1. Paste your JSON Schema in the schema panel.
  2. Paste the JSON instance to validate.
  3. Review pass/fail status and detailed error paths.

FAQ

Which JSON Schema drafts are supported?
Draft-07 is the default; draft-04 and 2019-09 are available in the selector.
Does validation hit a server?
No. Validation runs with a client-side schema engine.
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