Validate JSON data against a JSON Schema. Catch missing required fields, wrong types, pattern mismatches, and enum violations before they hit production.
JSON Schema is a vocabulary for annotating and validating JSON documents. It defines the shape of valid JSON data — required fields, data types, numeric ranges, string patterns, and enumerated values. The spec is maintained under the IETF (draft-bhutton-json-schema-00).
This validator checks: type (integer vs. number vs. string), required fields, minimum/maximum value constraints, enum allowed values, pattern (regex) matching on strings, and minLength/maxLength limits.
See also: JSON Formatter · JSON Diff · JSON → Code