Opening def files

SmartWare II Data File

Did your computer fail to open a def file?

Did you enjoy using our free file extension finder service? Please help us continue to make this service free by leaving us a good review at TrustPilot. You can write a quick review by going to It takes less then 2 minutes to give us a positive review and we love to read about our user experiences.

What is def file?

Spreadsheet and database format used by SmartWare II database software

Software that will open, convert or fix def files