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Brazil
Work out what type of Pix key you have, and check a CPF or CNPJ against its check digits, including the new alphanumeric CNPJ.
Checked in your browser. Nothing you type is sent to us or stored.
Try an example
A Pix key can be a CPF (an individual's taxpayer number), a CNPJ (a company's), a mobile number written with +55, an e-mail address, or a random key that Pix generates. The type is worked out from the shape of what you type.
Both end in two check digits computed with a mod-11 rule, so a single wrong digit is caught. Since July 2026 the Receita Federal also issues alphanumeric CNPJs, with letters in the first twelve characters; they are checked by the same rule, with each letter counted by its character code.
Whether a key is registered, and to whom, is only known inside Pix. Your bank shows the recipient's name before you confirm a payment: that is the check that protects you.
See limitationsCorrect bank details are half of a good transfer. The other half is what it costs: the fee and the exchange-rate margin.
FAQ
No. It means the CPF's check digits match. Whether someone has registered it as a Pix key is only visible to your bank when you start a payment.
With the country code: +55, then the two-digit area code, then the number. Pix stores phone keys in that form.
A CNPJ format the Receita Federal began issuing in July 2026, with letters allowed in the first twelve characters. The last two characters are still numeric check digits.
No. The check runs in your browser.
Free, no sign-up. The validator runs in your browser and stores nothing.
