Question 1

What is a Spanish DNI?

Accepted Answer

The DNI (Documento Nacional de Identidad) is the Spanish national identity number. It consists of 8 digits followed by a check letter, calculated by taking the digits modulo 23 and mapping the result to a fixed letter table.

Question 2

How is the DNI check letter calculated?

Accepted Answer

Take the 8-digit number modulo 23. The remainder (0-22) maps to a letter using the table TRWAGMYFPDXBNJZSQVHLCKE. For example, 12345678 mod 23 = 14, which maps to "Z", giving DNI 12345678Z.

Question 3

What is the difference between DNI and NIF?

Accepted Answer

NIF (Número de Identificación Fiscal) is the Spanish tax ID. For Spanish citizens, the NIF is identical to the DNI. For foreigners, the NIF is the NIE. For companies, the NIF is a separate code starting with a letter.

Spanish DNI/NIE Generator

Generator Settings

Validate DNI/NIE

ID Format

API Access

⚠️ Testing Only

Related EU Identity Tools