Schema Fake Forge

Paste a JSON Schema or an OpenAPI file and generate realistic, seeded, reproducible fake data as JSON, CSV or SQL inserts.

Free100% in your browserNo sign-up

Runs 100% in your browser. Your files never leave this device.

Schema, sample JSON or OpenAPI JSONSeedRow count (max 5000)Format

How it works

Seeded, reproducible fake data from JSON Schema draft-07 subset
Local $ref resolution, enum and format fidelity (email, uuid, date-time)
Sample JSON inference and OpenAPI schema picking
Export as JSON, NDJSON, CSV or SQL INSERT statements
Runs entirely in your browser, up to 5,000 rows