is a desktop application required to digitally sign documents and perform identification procedures on Spanish government websites (such as the Tax Agency/AEAT, Social Security, or administrative portals). It acts as a bridge between your computer's operating system, your digital certificate, and the web browser.

Starting with the 1.7 branch, the classic mass-signing engine ( firma masiva ) was deprecated. It was replaced by:

Right-click the executable installer file ( AutoFirma_64.exe or AutoFirma_32.exe ) and select .

What is the or behavior you are experiencing?

Verify that your digital certificate is properly installed on your operating system. For Windows, press Win + R , type certmgr.msc , and check under Personal > Certificates . If using Firefox, make sure the certificate is imported directly into Firefox's internal certificate manager. Error: Java Environment Crashes

Navigate to the AutoFirma installation directory (e.g., C:\Program Files\AutoFirma ).

Obtain the installer from a trusted source, such as the Autofirma 1.7.x download page.

– The Spanish government’s technological body, Secretaría General de Administración Digital (SGAD), has rolled out version 1.7.2 of AutoFirma , the country’s flagship desktop application for electronic signatures. This maintenance update reinforces the software’s role as a critical tool for citizens and businesses interacting with public administrations.

AutoFirma operates as a desktop application that integrates directly with web-based administration systems.