Convert dpx to dds Online: dpx2dds

You can use Tom's Editor to easily convert images from
SMPTE Digital Moving Picture Exchange 2.0 .DPX to Direct Show Surface .DDS.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

DPX

SMPTE Digital Moving Picture Exchange 2.0 is an image format with extension DPX.

DDS

DDS are files invented by Microsoft to be used in games, mostly as textures. Images can be compressed to save space but the compression methods defined by DDS are all very fast in terms of coding and decoding.