KeepassXC Keeshare
https://keepassxc.org/docs/KeePassXC_UserGuide#_database_sharing_with_keeshare
Prerequisites
Tools > Settings > KeeShare
Add Existing Database
Suppose you have a database called meins and want to synchronize the gaming database.
In meins create group gaming
Edit group gaming, select KeeShare
Type: Import
Path: …
Password: …
Wait for Entries to become available in the gaming group
Edit group gaming again, select KeeShare
If you start with “Type: Synchronize”, Keepass complains that the file exists.
That’s why we import first and switch to synchronize later on.