MineConflux is a server-side Fabric mod for Geyser and Floodgate cross-play servers. Players verify their Java and Bedrock identities, compare both saves in a web portal, and choose which progress to keep. After linking, both editions use the same Java UUID and the same save. It supports inventory previews, automatic backups, online-player protection, and Floodgate Local Linking. Tested with Minecraft Java 1.21.1, Fabric Loader 0.19.5, Fabric API 0.116.17+1.21.1, Java 21+, and Floodgate Fabric 2.2.4.