JSONBrew

JSON Schema Generator & Validator

Generate JSON Schema from sample data or validate JSON against a schema.

How to Use JSON Schema Generator & Validator

  1. In Generate mode, paste JSON into the left editor to auto-generate a JSON Schema.
  2. In Validate mode, paste JSON data on the left and a JSON Schema on the right.
  3. Validation results appear instantly — green for valid, red with error details for invalid.

Features

  • Two modes — Generate schemas from JSON or validate JSON against a schema.
  • Supports JSON Schema Draft 2020-12.
  • Detailed validation error messages with JSON path locations.
  • Load sample data to explore the tool instantly.
  • 100% client-side — your data never leaves your browser.