Are these registered companies?

No — they are valid-format but fictional and not associated with any real entity.

Does it support the new alphanumeric CNPJ?

Yes — set the format option to Alphanumeric to generate the 2026 format (letters A–Z and digits), with check digits validated by the official mod-11 over ASCII−48 values.

CNPJ Generator (valid format, fictional)

Live

Generate valid-format, fictional CNPJ numbers.

All generated data is fictional and intended for development, testing, QA, prototyping, and automation only. Do not use it for fraud, impersonation, or illegal activity.

Configure the options and press Generate to produce output.

About this tool

CNPJ is the Brazilian company taxpayer ID. The numeric format generates an 8-digit root, appends the 0001 headquarters branch, and computes two check digits with the official weighted mod-11 algorithm. Switch the format option to Alphanumeric to generate the new 2026 format (Instrução Normativa RFB nº 2.229/2024).

Example output

[
  "88.382.455/0001-60",
  "30.832.385/0001-14"
]

API endpoint

curl "https://codetoolshub.dev/api/v1/br/cnpj?count=3"

API

Frequently asked questions

Are these registered companies?: No — they are valid-format but fictional and not associated with any real entity.
Does it support the new alphanumeric CNPJ?: Yes — set the format option to Alphanumeric to generate the 2026 format (letters A–Z and digits), with check digits validated by the official mod-11 over ASCII−48 values.

CNPJ Generator (valid format, fictional)

Configuration

About this tool

Example output

API endpoint

Frequently asked questions

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