Free tools

Tax ID checkers

Pick a tax ID to check its format and, where possible, its check digit. Free, and nothing you type ever leaves your browser.

• Validate a Spanish NIF or CIFCheck the format and control letter of a NIF, NIE or CIF, in your browser, for free.
• Validate an Argentine CUITCheck the check digit of an Argentine CUIT, in your browser, for free.
• Validate a Chilean RUTCheck the verification digit of a Chilean RUT, in your browser, for free.
• Validate a Peruvian RUCCheck the check digit of a Peruvian RUC, in your browser, for free.
• Validate a Colombian NITCheck the verification digit of a Colombian NIT, in your browser, for free.
• Validate an EU VAT numberCheck the format of an EU VAT number, with full check-digit verification for several countries, for free.