Documents

CPF/CNPJ Generator & Validator

Generate and validate CPF and CNPJ in the browser, including the new alphanumeric format.

Validate

Type digits or letters. We detect CPF, numeric CNPJ, or alphanumeric CNPJ automatically.
Start typing a CPF or CNPJ to validate it.

CPF generator

016.138.782-90
939.401.406-35
443.114.782-91

CNPJ generator

Uses the RFB ASCII−48 rule; check digits stay numeric.
TZ.8H5.FBY/TI9A-09
8R.SKD.TE7/7CVH-05
RT.YFJ.A8V/NR60-22

How CPF and CNPJ validation works

CPF (11 digits) and CNPJ (14 positions) use modulo-11 check digits. This tool validates and generates them entirely in your browser — including the alphanumeric CNPJ base (letters A–Z and digits) with numeric check digits, following Receita Federal’s ASCII−48 conversion rule (IN RFB nº 2.229/2024; new alphanumeric inscriptions from July 2026).

Does a valid number mean the document exists?

No. A pass here only means the check digits match the modulo-11 algorithm. It does not confirm registration with Receita Federal or any other authority.

What changed in alphanumeric CNPJ?

Per Receita Federal (gov.br CNPJ Alfanumérico / IN RFB 2.229/2024), new CNPJs keep 14 positions but the first 12 may include letters A–Z. Existing numeric CNPJs stay valid. Each character is converted with ASCII code minus 48 before the same weighted modulo-11 calculation; the two check digits remain digits 0–9.

Is my data sent to a server?

No. Validation and generation run locally in your browser. Nothing you type here must leave your device for the tool to work.

When do alphanumeric CNPJs start?

Receita Federal’s published schedule targets July 2026 for new alphanumeric inscriptions only. Older numeric CNPJs are not rewritten. Always confirm against the official Receita Federal page for cutover windows.