What is .YDK file extension?
Yu-Gi-Oh! deck file used by YGOPRO, a Yu-Gi-Oh! dueling game that allows you to play on or offline; contains a deck of virtual playing cards; includes life points, counters, and card effects.
The YDK deck file contains Monster, Spell, and Trap cards that can be loaded into YGOPRO and used to duel other players. Each card has different information such as the level, attack, and defense.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.