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Check if Personal $1.00 / 1,000 calls

Valid Dni (ES)

What this tool does

This tool checks if a Spanish National Identity Document (DNI) number follows the correct format and mathematical rules. It validates the eight-digit number and the final letter to see if they match the official validation pattern.

Common uses

  • Verifying customer identification documents during online registration
  • Checking the accuracy of data entered in forms to prevent typos
  • Validating address books or contact lists for Spanish residents

Input data

Parameter Required Example Description
dni Yes 44016116 Enter the DNI number as eight digits followed by one letter (for example, '44016116' or '4401611M'). This field is required.

Output data

Field Description
result Indicates whether the DNI number is valid (yes) or invalid (no) based on the format rules.
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