DNI Validator (Spain)

Validate a Spanish DNI. If you need to generate a new one, try our DNI Generator.

international.disclaimer

This tool generates fictitious data intended exclusively for software testing and development purposes. The data does not correspond to real people or entities and must not be used for illegal, fraudulent purposes, or in ways that violate the privacy of others. Compliant with LGPD (Brazilian Data Protection Law).

See also:

State Registration Generator
UUID Generator
SSN Validator (USA)
Code Formatter
Phone Generator
Codice Fiscale (Italy)
Steuer-ID Validator (Germany)
DNI (Argentina)

DNI Validation (Spain)

What does the validator check?

Checks if the Spanish DNI control letter matches the official calculation: 8-digit number divided by 23, using the remainder as an index in the letter table.

When is it considered invalid?

When it doesn't have 8 digits + 1 letter, contains characters outside the pattern, or the control letter doesn't match the calculation.

Use in development

Platforms targeting the Spanish market need to validate DNI. The validator helps verify if your implementation is correct.