Question 1

What is a JSON Schema validator?

Accepted Answer

It checks a JSON instance against a JSON Schema. This page implements a small draft-07-ish subset in local JavaScript: type, required, properties, additionalProperties, items, numeric bounds, string length, enum, const, and combinators.

Question 2

Does it support the full spec?

Accepted Answer

No. It is meant for common object validation. $ref only follows local hash pointers such as #/definitions/name. Formats, remote refs, and some draft-07 edge cases are skipped.

Question 3

Where do errors show up?

Accepted Answer

Each error lists a JSON Pointer path and a message, for example /email for a missing required property. Fix the instance or the schema and the list updates as you type.

Question 4

Is my JSON uploaded?

Accepted Answer

No. Parsing and checking run in the browser. Nothing is sent to ToolPetal.

JSON Schema Validator