DNI / NIE / CIF Generator

Spanish tax identifiers — DNI, NIE and CIF with their official check digits.

Spain Validation Generation

Try the demo NuGet: DocumentNumber.Spain.Vat.Generator

How generation works

The DNI / NIE / CIF generator builds a structurally valid sample using the same rules the validator enforces — check digits included. Use it for test data and fixtures; never for production records.

Install the package

bash

dotnet add package DocumentNumber.Spain.Vat.Generator

Generator in C#

Program.cs

using DocumentNumber.Spain.Vat.Generator;

var generator = new VatGenerator();
var sample = generator.GenerateDocumentNumber();

Console.WriteLine(sample);

Live example

49365682T — a real DNI / NIE / CIF value accepted by the validator

Try DNI / NIE / CIF generation

Runs the exact same library code your application uses. Nothing you enter is stored.

Frequently asked questions

What is DNI / NIE / CIF?

Spanish tax identifiers — DNI, NIE and CIF with their official check digits.

How does DNI / NIE / CIF generation work?

The generator builds a structurally valid DNI / NIE / CIF sample using the same rules the validator enforces — including check digits. Generated values are intended for tests and development only.

How do I install the DNI / NIE / CIF generator package?

dotnet add package DocumentNumber.Spain.Vat.Generator

Is the value I enter in the demo stored?

No. Demo inputs are processed in memory for the current request only and are never persisted or shared.