Spanish NIF, NIE, CIF and IBAN validator and generator

Check in seconds whether a Spanish NIF, NIE, CIF or an IBAN is correct, or generate batches of fictitious test data. Free, no sign-up, and nothing ever leaves your browser.

Paste one or several identifiers (one per line) and the tool automatically detects the type, verifies the check letter or check digits, and explains what is wrong when something fails: incorrect control character, wrong length or unrecognised format. Handy for cleaning customer databases, validating forms or reviewing files before an import.

A list of NIFs or IBANs is a personal data file in every sense of the term; pasting it into some random website to validate it means handing it to a third party without knowing what they'll do with it or where they'll keep it. That simply cannot happen here: all validation runs as JavaScript on your device and Gestycontrol never receives, stores or processes any of the data you enter. You can download the results as a CSV file to work on them in your spreadsheet.