Validators

Check documents and common inputs with public rules and instant results.

All validators tools

Available tools organized by their main use case.

Validators for Brazilian documents with check digits.

Check whether a CPF has valid check digits.

Check whether a CNPJ has valid check digits.

Format CPF and CNPJ with masks, remove punctuation, and copy the result in the browser without validating registration or checking Receita Federal.

Validators for emails, phone numbers, and contact data without external lookup.

Validate email syntax in the browser with clear warnings and no DNS, domain, or mailbox checks.

Local validators for payment-data format and check digits without external lookup.

Check locally whether a card number has a plausible format and valid Luhn check digit without sending or saving the number.