test CNPJ generator
A CNPJ has 12 base digits versus a CPF 9, so the weights in the calculation do not descend all the way through: they reset halfway. This page closes that calculation with a concrete number and shows the alphanumeric format Receita started issuing in 2026.
First digit is 0 because the weighted sum lands on an exact remainder of 0; second digit is 1 because the next sum leaves remainder 10, and 11 minus 10 is 1.
Here neither remainder falls under 2, so both digits come from 11 minus the remainder: 11 minus 3 is 8, 11 minus 10 is 1.
Each letter is worth its ASCII code minus 48: A is 17, B is 18, C is 19, D is 20, E is 21; running the same CNPJ weights over those values, the check digits close as 35.
Not necessarily. It only passes the mathematical check-digit rule.
Yes, for new registrations since 07/31/2026, under IN RFB nº 2.229/2024: the first 12 characters can be an uppercase A-Z letter or a digit. A CNPJ issued before that date stays numbers-only.
It's the character's ASCII code minus 48. For digits this reproduces the usual 0-9 value; for uppercase letters A-Z the result ranges from 17 to 42, and feeds the same weighted sum as the numeric calculation.
No. It closes the modulo-11 calculation over a synthetic base, without querying any Receita registry; the number is meant to test input masks and validation, not to prove an open company or registration status.
0001 identifies the headquarters by convention; each additional branch under the same 8-digit root receives the next number, 0002, 0003, and so on, each with its own 2 check digits calculated over its own base.
The tool generates eight base digits, uses 0001 as the establishment order and calculates the two check digits with modulo-11 weights. The result is valid for tests, not real registrations.
The number is generated locally in the browser. Analytics receives only action, status, type and format, never the generated CNPJ.