Synthetic data

Generate objects, arrays and primitives, with UUID/date/email/URL formats. No real identities or live payment details are used.

Validation

Every candidate must pass the supplied schema. Unsupported or unsatisfiable constraints fail with an explicit error; invalid data is never marked valid. Network refs are disabled.

Reproducibility

A seeded local PRNG and fixed date range keep output repeatable. Output is limited to 2 MiB and generation attempts are bounded. Relations currently copy fields within a record.

Inputs explained

Generation mode

Generation mode

JSON Schema

JSON Schema draft 4 through 2020-12. Local refs only. Generation is bounded and each candidate is validated.

Field definitions

Object mapping field names to JSON Schema definitions, e.g. {"id":{"type":"string","format":"uuid"}}.

Root type

Root type

Record count

Generate 1–200 independent records.

Seed

Same seed and configuration reproduce the output; blank creates a random seed.

Maximum depth

Maximum depth

Default array length

Default array length

Time zone

IANA zone for synthetic date-time strings. Dates use a fixed epoch range for reproducibility.

Field overrides

Dot paths mapped to {generator: email|uuid|url|date|date-time|integer|enum|const, values: [...], value: ...}.

Field references

Array of {source: "id", target: "ownerId"}. Copies fields within each record; no expression execution.

Output

Output