JetRift compatibility and limits
JetRift hosts shared worlds for Java 26.3 and Bedrock 26.60. It runs our Butternut engine and is in early access. Use this reference before inviting friends or moving an existing save.
| Feature | Current support | Practical limit |
|---|---|---|
| Java Edition | 26.3, protocol 777 | Exact supported version; older and newer clients are not promised. |
| Bedrock Edition | 26.60, protocol 2225 | Exact supported version; app-store updates can move ahead of server support. |
| Crossplay | Java and Bedrock in one world, included | No Geyser install needed. Identities and inventories remain separate across editions. |
| Java devices | Windows, macOS and Linux Java clients | The Minecraft for Windows app is Bedrock, not Java. |
| Bedrock devices | Windows, Android, iPhone and iPad | Use the dashboard’s Bedrock details, normally UDP 19132. |
| Consoles | No supported direct custom-server setup | Xbox, PlayStation and Switch need separate workarounds. Do not assume phone instructions apply. |
| Free plan | Three servers per account, no ads or card | Shared finite capacity; intended for small friend groups, not a guaranteed large-server resource allocation. |
| Idle behavior | Sleep after about two empty minutes; wake on join | No simulation while asleep. A manual stop or failure may require dashboard action. |
| Java mods and plugins | JetRift’s own plugin catalog | Forge, Fabric, Paper and Spigot extensions do not load. Arbitrary datapacks and vanilla parity are not guaranteed. |
| World import | Java world ZIP containing level.dat | Not a Bedrock .mcworld or LevelDB converter. Check dimensions, version and custom content on a copy. |
| Backups | World downloads; optional Google Drive connection | Configure backups and keep an independent copy. Do not treat idle storage as your only backup. |
| Resource packs | Edition-specific behavior | Java resource packs are not converted for Bedrock. |
Player accounts and permissions
Java players use their Java identity. Bedrock players sign in with Microsoft/Xbox; the server adds a dot to their names and replaces spaces with underscores. For example, Sam Builder becomes .Sam_Builder. Use that exact name when managing the whitelist or operators. A matching visible name across editions does not merge progress.
Engine behavior
Butternut is a separate implementation, not Mojang’s server, Paper or a mod loader. Support for a client version means the client can connect; it is not a promise that every block, mob, redstone contraption or imported save behaves exactly like vanilla. Check known issues and test the mechanics your group relies on before a migration.
Capacity and performance
A free server does not reserve an unlimited CPU, memory or storage allocation. Startup can be delayed or fail when capacity is unavailable or a service is unhealthy. We do not publish a universal player-capacity promise: world size, loaded chunks, entities and plugins change the workload. Our benchmark page records the actual test environment and its limitations.
Before moving a world
Keep an untouched export. Test the Overworld, Nether, End, inventories, permissions and important builds on a copy. A world from a newer release, modded blocks or a different identity mode may require work outside the import tool. See the Aternos migration checklist.
If something here changes
This reference is checked against our engine protocol constants, dashboard and hosting configuration. Last checked 3 November 2026. The dashboard’s current join details take priority for your server. Report a mismatch using the feedback button so we can update the page and affected guides.
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