CNPJ Validator (Alphanumeric)
Check whether a Brazilian CNPJ (company tax ID) is structurally valid — both the traditional numeric format and the new alphanumeric standard taking effect in 2026.
The new alphanumeric CNPJ
From 2026, Brazil's Receita Federal issues CNPJs with letters and numbers in the first 12 positions, keeping 2 numeric check digits. This tool validates both formats.
How validation works
We compute the check digits with the Module 11 algorithm. It confirms the number's structure is correct but does not query the company's registration status.
How to use
Paste or type the CNPJ in the field — with or without punctuation, in the traditional numeric format or the new alphanumeric one. The tool formats it automatically and instantly tells you whether the check digits are correct, handy for verifying records, invoices and databases before saving.
Frequently asked questions
Does it validate the new alphanumeric CNPJ?
Yes, it supports the alphanumeric standard taking effect in 2026/2027.
Does it confirm the company exists?
No, it is a structural (check-digit) validation only.
Is my data sent anywhere?
No, everything runs in your browser.
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