Códigos OCR del DNI Español

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10K+
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Content rating
Everyone
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About this app

DISCLAIMER: This application is not affiliated with any government entity.

The Spanish National Identity Document (DNI) is a credit card-sized document issued by the Ministry of the Interior through the National Police, which certifies the identity and personal data of its holder, as well as their Spanish nationality.

At the bottom of the back of the DNI, there is a series of OCR-B characters intended to be machine-readable according to ICAO standards for documents (Doc 9303 - Machine-Readable Travel Documents, Part 3):

https://www.icao.int/sites/default/files/publications/DocSeries/9303_p3_cons_es.pdf

These characters correspond to the data that appears on the front, such as the document number, the date of birth and validity of the document, the name and surnames, or the DNI number itself.

Among these OCR characters appear four check digits (indicated in red or green in the application).

One of them is the infamous lone number at the end of the second line.

This application calculates these digits based on the entered data, thus demonstrating that they are not based on certain urban legends.

Don't hesitate to try it.
Updated on
Aug 12, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Location, App activity and 2 others
This app may collect these data types
Location, App activity and 2 others
Data is encrypted in transit
Data can’t be deleted

App support

About the developer
Andrés Bravo Cuesta
asistencia.abc1@gmail.com
San Pedro y San Felices 09001 Burgos Spain

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