Mod
ViaBackwards
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Allow older Java Edition clients to connect to newer servers.
Fabric is a mod loader for versions 1.14+ of Minecraft, particularly popular for client side and optimization mods.
Paper is a fork of Spigot that adds its own plugin API on top of the Bukkit API. All Spigot plugins are compatible with paper, not all paper plugins are compatible with Spigot.
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Modrinth
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ViaBackwards
On Fabric, use either ViaFabric or ViaFabricPlus. To override the included version
- in ViaFabric, put ViaBackwards into the
modsfolder - in ViaFabricPlus, put ViaBackwards into the
ViaFabricPlus/jarsfolder
Depending on the platform and version, this also requires ViaVersion.
Requires Java 17. See here how to update your installed Java version. As a last resort, you can download Java 8 downgraded builds from our ci.
Get access to Via* with new MC version support early
Starting with 1.20.5, ViaVersion and ViaBackwards will only be released a day or so after a Minecraft update unless the protocol changes of the update were trivial. If you want early-access, usually days or even weeks before the final release, you can subscribe to either:
- GitHub Sponsors (preferred option, also comes with source code access. Use the
/verifycommand on this Discord after), or alternatively - Patreon (see the highest tier and make sure to link Patreon to your Discord account under Discord Settings->Connections)
Note on release channels
It is recommended to always use the latest beta release. Alpha builds are used for work on snapshot version compatibility or other cutting-edge changes.
Always use the same build channel across the ViaVersion, ViaBackwards, and ViaRewind projects.
Releases/Dev Builds
You can find releases in the following places:
- Hangar (for our plugins): https://hangar.papermc.io/ViaVersion/ViaBackwards
- Modrinth (for our mods): https://modrinth.com/mod/viabackwards
- GitHub: https://github.com/ViaVersion/ViaBackwards/releases
Dev builds for all of our projects are on our Jenkins server:
Known issues
- 1.17+ min_y and height world values that are not 0/256 are not supported. Clients older than 1.17 will not be able to see or interact with blocks below y=0 and above y=255
- <1.17 clients on 1.17+ servers might experience inventory desyncs on certain inventory click actions
- Sound mappings are incomplete (see here)
Other Links
Maven: https://repo.viaversion.com
List of contributors: https://github.com/ViaVersion/ViaBackwards/graphs/contributors
Special Thanks
YourKit supports open source projects with innovative and intelligent tools for monitoring and profiling Java and .NET applications. YourKit is the creator of YourKit Java Profiler, YourKit .NET Profiler, and YourKit YouMonitor.
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