Generator Playground Catalog Docs Validator

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Schema Playground & Bulk Studio

Build a schema of mutually consistent columns and generate seed-reproducible batches.

Verified official algorithms

Exact check digit calculation (DNI mod 23, IBAN mod 97, Luhn for cards) so your data never breaks production validators.

Zero false positives

Bulk export

Generate up to 10,000 records per batch for stress testing, database migrations or direct seeding with SQL INSERT scripts.

Formats: JSON / CSV / SQL / TXT

Reproducible and private

Everything is generated in your browser: use “Share” in the header and anyone opening the link gets exactly the same data, with the same seed.

No sign-up · No cookies

Generators by type

DNI
NIE
CIF
IBAN
credit card
Spanish phone
NSS
CCC

Validators by type

DNI
NIE
CIF
IBAN
credit card
NSS
CCC

DataMockSeed

Fake data, real format - 2026

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Generator Playground Catalog Docs Validator