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ViaBackwards project artwork

Modrinth · Minecraft mod

ViaBackwards

Allow older Java Edition clients to connect to newer servers.

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which ViaBackwards release should I use?

Updated 4 days ago
Latest stable file 5.11.0
Game version 1.10, 1.10.1, 1.10.2
Loader Fabric, folia, paper

ViaBackwards 5.11.0 targets 1.10, 1.10.1, 1.10.2 with Fabric, folia, paper. Installation on the client is optional. Installation on the dedicated server is optional. All 1 required mods have matching files.

Where it goes

Is ViaBackwards required on the client, server, or both?

Installation on the client is optional. Installation on the dedicated server is optional.

Client Optional
Dedicated server Optional
Loader for this release Fabric, folia, paper
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source marks this as usable on both the client and server.

Understand client and server requirements Read the Minecraft installation guide

What else does ViaBackwards 5.11.0 need?

5.11.0. Change the file and its required mods may change too.

All 1 required mods have matching files

Install ViaVersion first. We found matching files for this game-version and loader setup. 2 come through another mod in the chain.

3 listed on this file 2 pulled in by those mods
ViaVersion Needed by ViaBackwards 5.11.0
required
Matching file found Matched file: 5.11.0
ViaFabric Optional for ViaBackwards 5.11.0
optional
Matching file found Matched file: 0.4.19+111-main
ViaRewind Optional for ViaBackwards 5.11.0
optional
Matching file found Matched file: 4.1.3
ViaBackwards Needed by ViaVersion
pulled in
Matching file found Matched file: 5.11.0
Fabric API Needed by ViaFabric
pulled in
Matching file found Matched file: 0.156.0+26.2

2 extra mods were pulled in by other dependencies. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.

Before you install it

Add ViaBackwards without breaking your instance.

Built for ViaBackwards 5.11.0. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use 5.11.0. It targets 1.10, 1.10.1, 1.10.2 with Fabric, folia, paper; another release may have different loader, side or dependency requirements.

  2. 02

    Bring the mods it needs

    Install ViaVersion first. We found matching files for this game-version and loader setup. 2 come through another mod in the chain.

  3. 03

    Put it on the correct side

    Installation on the client is optional. Installation on the dedicated server is optional.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside 5.11.0. It opens that exact file at the source.

About this project

What does ViaBackwards add?

ViaBackwards

On Fabric, use either ViaFabric or ViaFabricPlus. To override the included version

  • in ViaFabric, put ViaBackwards into the mods folder
  • in ViaFabricPlus, put ViaBackwards into the ViaFabricPlus/jars folder

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 /verify command 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:

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

https://www.yourkit.com/

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.

Project description from Modrinth.

Pick your setup

ViaBackwards by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

59 available setups

Showing the newest 12 of 59 game versions. Older files are in the list below.

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

ViaBackwards versions and loaders

100 of 100 releases match

Looking for an older file? The official Modrinth project page is in Resources.

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