Skip to content

JSON Schema Validator

Validate JSON against a JSON Schema (draft 2020-12, 2019-09, 7 or 4) with a clear report of each error, its path and keyword.

Runs in your browserJSON + Schema → Report
Loading tool…

How to use the JSON Schema Validator

  1. Paste the JSON Schema in the first box and the JSON document in the second. The report updates as you type.
  2. The draft is taken from $schema; choose one explicitly if your schema has no $schema.
  3. Each error shows the path of the failing value (e.g. /tags/1), the schema keyword that failed and where it is in the schema.

Privacy and limitations

  • Your data is processed on your device and is not uploaded to any server.
  • Remote $ref URLs are not downloaded.
  • The $dynamicRef keyword of draft 2020-12 is not supported by the validator; $ref, $defs and $anchor are.
  • Validation runs in your browser without compiling code, so very large documents may take a moment.

Frequently asked questions

Are formats such as "email" and "date-time" checked?

Yes. Common formats (date, time, date-time, email, hostname, ipv4, ipv6, uri, uuid, regex and more) are validated.

Can my schema reference other files?

Only references inside the same schema (e.g. "#/$defs/address") work. Remote $ref URLs are never fetched; paste those definitions into $defs instead.

Related converters

JSON ValidatorCheck whether JSON is valid, pinpoint the line and column of syntax errors and flag duplicate keys.JSON to JSON SchemaInfer a draft 2020-12 JSON Schema from a sample JSON document.JSON FormatterBeautify and pretty-print JSON with 2-space, 4-space or tab indentation, with optional key sorting.JSON to Excel (XLSX) ConverterExport a JSON array of objects to an Excel .xlsx workbook, or an object of arrays to one sheet per key, with a live preview.JSON UnflattenerRebuild nested JSON from an object with dotted keys.JSON FlattenerFlatten nested JSON into a single-level object with dotted keys.JSON to Query StringConvert a JSON object into a URL-encoded query string. Arrays become repeated keys.JSON to Python DataclassGenerate Python dataclasses with type hints from sample JSON.

Browse all json converters →