JSON Schema Validator

Why Validate Against JSON Schema?

JSON Schema is a vocabulary for annotating and validating JSON documents. It defines expected types, required fields, value ranges, and patterns — catching malformed data before it reaches your database or crashes your application. Our validator checks your data against your schema in real time and reports every violation with an exact JSON path.

Features

  • Type checking — validates string, number, integer, boolean, array, object, and null.
  • Constraint support — required, minLength, maxLength, minimum, maximum, enum, and pattern.
  • Recursive validation — properties and array items are validated to any depth.
  • Clear error paths — every error includes the exact JSON path where it occurred.
  • Side-by-side editor — data and schema are edited in parallel for fast iteration.

Common Use Cases

  • Validating API request/response payloads during development.
  • Testing form data shapes before integrating with a backend.
  • Authoring and verifying JSON Schema definitions for documentation.
  • Catching configuration file errors before deploying to production.

Tags