JSON Schema Validator

Validates JSON data against a JSON Schema and reports path-based errors such as $.user.email. Supports a documented subset of the spec, not the full draft, see the FAQ below.

Private by architecture: All processing is 100% client-side memory. Your data never leaves this browser tab.

JSON data

0 lines · 0 charsJSON

JSON Schema

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Validation report

Paste data and a schema, then click Validate.

Example

Schema:

{
  "type": "object",
  "required": ["email"],
  "properties": {
    "email": { "type": "string", "format": "email" },
    "age": { "type": "integer", "minimum": 0 }
  }
}

Data with an invalid email produces:

$.email: does not match format "email" (basic check only).

FAQ

Which JSON Schema keywords are supported?: type (including type arrays), required, properties, items, additionalProperties, enum, const, pattern, format, minimum, maximum, minLength, maxLength, minItems, maxItems.
What is not supported?: allOf/anyOf/oneOf, $ref, if/then/else, patternProperties, and tuple-style items arrays are not enforced. This is not full draft support.
How strict is format?: email, uri, uuid, date, and date-time are checked with a basic regular expression, not the full formal grammar for each format.