JSON Cluster

JSON Schema Validator

Validate JSON data instances against JSON Schema specifications. Verifies types, required keys, enum values, regex patterns, and nested arrays locally.

● LOCAL ● NO NETWORK ● JSON SCHEMA DRAFT-07 / 2020-12

JSON Instance Data

JSON Schema Draft-07

Comparing structural differences between two JSON objects? Open JSON Diff. Need to generate TypeScript interfaces? Use JSON → TypeScript.

About this tool

What it does

Evaluates a JSON data instance against a declarative JSON Schema. Supports standard validation keywords including type, properties, required, items, pattern, minimum/maximum, minLength/maxLength, enum, const, and composition operators (allOf, anyOf, oneOf). Detects schema dialect from $schema declarations.

No data leaves your browser. Both schema and instance payload remain in local execution memory.

EngineLocal Recursive JSON Schema Engine

DialectsDraft-07, Draft 2020-12 compatible core assertions

Network transferNone

Limitations

Remote schema references via external HTTP $ref URIs are not resolved over the network to protect privacy and support offline operation. Local internal pointers (e.g. #/$defs/...) are supported.