A practical, dependency-free schema check
The validator implements a focused JSON Schema subset for everyday API payloads: type, required, properties, items, enum, const, minLength, pattern, minimum, maximum and additionalProperties.
Readable errors
Every issue includes a JSON path such as $.user.email or $.items[2]. Multiple errors are collected in one pass, making it easier to correct a whole payload at once.
Local-only: both JSON values are parsed and checked in this tab with a small built-in validator. Nothing is sent to an external engine or server.