Local-first • No server upload
Developer

JSON Schema Validator

Check JSON against common schema rules locally. — 100% browser-side, no server upload, works offline.

Browser-local JSON utility

Validate JSON against a schema

Local validation

Paste JSON or open a local .json file.

Paste JSON Schema or open a local .json file.

Supports common type, required, properties, items, enum, and length/count checks locally.

Common questions

Are my JSON values uploaded?

No. JSON data and schemas remain in this browser.

What happens with invalid JSON?

ByteDip reports a local line and column hint and leaves the source text unchanged.

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