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CNPJ Generator

Generate valid CNPJ numbers for tests in numeric or alphanumeric format.

Tipo de CNPJ

As 12 primeiras posições podem ter letras e números; os 2 últimos caracteres são dígitos verificadores numéricos.

Esta ferramenta gera valores fictícios para testes. Ela não consulta a Receita Federal nem confirma existência de empresa.

What is CNPJ Generator?

Updated June 2026

Generate valid CNPJ numbers for tests in numeric or alphanumeric format.

How to use it?

  1. Fill in the main fields required by the tool.
  2. Run the action to generate, validate, format, or convert the content.
  3. Review the structured result and copy it when needed for tests, documentation, or homologation.

Rules and limitations

  • Processing runs locally in the browser whenever the tool allows it.
  • Generated data is intended for tests, demos, fixtures, and development environments.
  • The result is technical support and does not replace official checks when those are required.
  • User-provided input and generated output are not translated or modified when switching languages.

Frequently asked questions

Are the data sent to a server?

No. The tool follows the Tools4.Dev.Br privacy pattern and runs the processing in the browser whenever possible.

Can I use the result in production?

Use the result as technical support and validate your product rules. For official data, always use the appropriate government, financial, or business source.

Does switching language change my input or generated result?

No. The language selector changes interface labels and metadata only; pasted, typed, copied, or generated content is preserved.

Do I need an account?

No. The tool is free to use and does not require registration for normal browser-based workflows.

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CNPJ Validator

Validate the mathematical structure of CNPJ numbers in numeric or alphanumeric format.

Alphanumeric CNPJ Generator

Generate valid alphanumeric CNPJ values for tests, with letters and numbers in the first 12 positions.

Alphanumeric CNPJ Validator

Validate alphanumeric CNPJ values with or without mask and check verifier digits.

CPF Generator

Generate valid CPF numbers for software tests in seconds, with or without formatting.