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Certificate Number Generator

Generate fictitious birth/marriage/death certificate numbers for testing.

For software testing only. The data generated here is random and does not belong to any real person or company. Using it for fraud or in bad faith is a crime.

How to use

  1. Select the certificate type: birth, marriage or death.
  2. Click Generate to create a fictitious certificate number in the official 32-digit format used by Brazilian notary offices.
  3. Copy the number for use in software testing or form validation.

About this tool

Brazilian civil certificates (birth, marriage, death) follow a standardised 32-digit number defined by CNJ (Conselho Nacional de Justiça). This tool generates numbers in the correct format with valid check digits for software testing purposes.

The generated numbers include the notary office code, book, page and entry fields — all random but structurally valid. They are not registered in any civil registry and cannot be used as real documents.

Developers use these numbers to test form validation, OCR pipelines and document processing systems that need to handle Brazilian civil certificate numbers.

Frequently asked questions

Does my data leave my browser?

No. Everything runs locally in JavaScript on your device — nothing is transmitted or stored.

Can I use the result commercially?

Yes. The output is generated locally in your browser and is yours to use however you like — commercially or otherwise.

Can I use what this tool generates?

Yes. Everything is generated locally in your browser. You can copy, download and use the output however you like.

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