Free tools

Validators that run in your browser. Nothing is uploaded: the maths happens on your device.

12345678ZSpanish NIF, NIE and CIF validatorCheck the control letter of a Spanish DNI, NIE or CIF with the official algorithm. Free, and nothing is sent.
ES91 2100 0418IBAN validatorCheck the control digits of an IBAN from any country (ISO 13616, modulo 97). Free, and nothing is sent.
P<UTOERIKSSON<<MRZ reader and validatorPaste the machine readable zone of a passport or ID card and check its ICAO 9303 check digits. Free, and nothing is sent.