Convert p4i to dds Online: p4i2dds

You can use Tom's Editor to easily convert images from
P4I .P4I to Direct Show Surface .DDS.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

P4I

P4I is an image format with extension P4I.

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.