.SD3 File

File extension sd3 is associated with the Hy-Tek Meet Manager application for Windows that allows swimming competition organizers to manage every aspect of organizing a meet.

A .sd3 file stores list and information about competitors.

How to open:

Use Hy-Tek Meet Manager to import data from *.sd3 files.

How to convert:

As far as we know, there is now way how to convert .sd3 files to anything else.