CNPJ test data generator

Generate numeric or alphanumeric examples with check digits to test systems in your browser.

What does a test CNPJ prove?

Create local fixtures for masks, field lengths and check-digit tests. Numeric and alphanumeric modes use the Receita Federal algorithm. These examples do not establish company identity or registration.

How to generate test data

Choose a type and quantity from 1 to 100, then click Generate. Switch punctuation without changing the values, copy the displayed batch, or reset. Sharing restores settings only; generated output stays in memory until you copy it.