Convert tn4 to dds Online: tn42dds

You can use Tom's Editor to easily convert images from
Tiny Stuff .TN4 to Direct Show Surface .DDS.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

TN4

Tiny Stuff is an image format with extension TN4.

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.