This only supports Steam-based servers, either co-op or dedicated.
Convert Steam ID to Palworld Player UID
What is the No Steam UID?
In the event the Steam Online Subsystem is not available, for example if -nosteam is used or if the Steam client is not running on Windows or if the steamclient.so library is not available on Linux, Palworld uses a different algorithm for player UIDs.
Convert Palworld Player UID to Steam ID(s) (EXPERIMENTAL!)
The process of converting a Steam ID to a Player UID is a one-way process. As such, we "convert" Palworld Player UIDs back to Steam IDs by bruteforcing every Steam ID. The process means that multiple different Steam IDs can map onto the same Palworld Player UID.
CPU and GPU bruteforce currently only supports the regular Palworld Player UID, and not the No Steam UIDs that are used when Steam is not available. Database lookups support both Steam and No Steam UIDs.