How to open A09 files
Did your computer fail to open an A09 file? We explain what A09 files are and recommend software that we know can open or convert your A09 files.
What is an A09 file?
The A09 file extension indicates to your device which app can open the file. However, different programs may use the A09 file type for different types of data.
While we do not yet describe the A09 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 A09 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 A09
These apps are known to open certain types of A09 files. Since many different programs may use A09 files for different purposes, you may need to try a few of the apps to open your specific A09 file.
 | WISO Sparbuch | User submitted |
 | Symphonie Data Retriever | User submitted |
 | EasyTax AG | User submitted |
 | AliForm | User submitted |
 | ZipZag Archiver | 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.