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✅ JSON Schema Validator

Validate JSON data against a practical JSON Schema subset with field paths, error reasons, validity status, and copyable/downloadable reports.

This is a local JSON Schema subset validator, not a complete draft implementation and not a replacement for server-side validation. Samples are synthetic; do not paste production secrets.

Safe Samples

Load a schema + JSON pair to inspect valid / invalid status, field paths, and the error report.

Validation Result

Status Initial
Error Count 0
Schema Issues 0
First Issue - 
Enter a schema and JSON data; results will appear here.
Supported Scope & Limits

Supported practical subset: type, required, properties, additionalProperties, items, enum, const, min/max length, pattern, format, number range, array length, uniqueItems, allOf, anyOf, oneOf, and not.

Remote $ref is not resolved, external schemas are not loaded, and no security/compliance advice is provided. Review complex drafts, business rules, and server constraints in the real validator.

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JSON Schema validation workbench that validates JSON locally in your browser and returns field paths, error counts, first issue, a copyable report, and a downloadable report. Supports a practical JSON Schema subset: type, required, properties, additionalProperties, items, enum, const, string length/pattern/format, number range, array length/uniqueItems, allOf, anyOf, oneOf, and not. Schema and JSON data are not uploaded; complex draft compatibility, business rules, and server-side validation still need review in the real system.