CNPJ Validator

Use our CNPJ validator! Just enter a CNPJ number and click on 'Validate CNPJ' to check if it is valid.

How it works

  • The validation is done on the server and does not store any information.
  • The validator checks if the CNPJ follows the rules of the Federal Revenue Service.
  • The format of the CNPJ and its check digits are verified.
  • The system accepts CNPJs with or without punctuation (00.000.000/0001-00 or 00000000000100).
  • The validation result is displayed through a green icon (valid) or a red icon (invalid).

How to use the API

You can integrate our CNPJ validator into your application using our REST API.

Endpoint

POST /api/validators/cnpj

Request example

{
  "cnpj": "00.111.222/0000-00"
}

Response

{
  "isValid": false
}