Your faith decides your doctrines, holy wars, and acceptable marriages, so swapping it can reshape a whole playthrough. After enabling debug mode, you can change any character's religion instantly.
The change religion command
Use set_faith with the faith's ID:
That converts your own character. Add a character ID to convert someone else — for example set_faith catholic 78.
Finding faith IDs
You need the internal faith ID rather than the display name. Browse the full list of CK3 faiths to find any faith's ID and a ready-to-copy command.
Converting religion without cheats
If you'd rather convert the legitimate way:
- Adopt the faith of a county you hold, or convert at the cost of piety when the option is available.
- The Learning lifestyle's Theologian tree makes conversion and religious schemes far easier.
- Reform or create your own faith from the religion screen to keep your dynasty's identity while choosing better tenets.
Frequently asked questions
What is the change religion cheat in CK3?
The console command set_faith changes your character's faith — for example, set_faith catholic. Add a character ID to target someone else. It only works in debug mode.
Does set_faith convert my whole realm?
No. set_faith only changes the chosen character's faith. Your counties and vassals convert over time once their ruler follows the new faith, just as they would normally.
Where do I find faith IDs in CK3?
Every faith's ID is listed on its page in the faith database — for example catholic, sunni, or asatru.