How to open F12 files
Did your computer fail to open a F12 file? We explain what F12 files are and recommend software that we know can open or convert your F12 files.
What is a F12 file?
The F12 file extension indicates to your device which app can open the file. However, different programs may use the F12 file type for different types of data.
While we do not yet describe the F12 file format and its common uses, we do know which programs are known to open these files, as we receive dozens of suggestions from users like yourself every day about specific file types and which programs they use to open them.
We are continually working on adding more file type descriptions to the site, so if you have information about F12 files that you think will help others, please use the Update Info link below to submit it to us - we'd love to hear from you!
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Generic F12
These apps are known to open certain types of F12 files. Since many different programs may use F12 files for different purposes, you may need to try a few of the apps to open your specific F12 file.
 | WISO Steuer-Sparbuch | User submitted |
 | Embird | User submitted |
 | FutureTax for NETFILE | User submitted |
 | FutureTax | User submitted |
 | FutureTax for EFILE | User submitted |
Try a universal file viewer
Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.