ᴍɪɴᴇᴄʀᴀꜰᴛʀᴇꜱᴏᴜʀᴄᴇꜱ
ModsShadersPluginsResource PacksModpacks
Log inSign up

ViaBackwards

Modrinth

Allow older Java Edition clients to connect to newer servers.

2.4M downloads865 followersUpdated 3d ago

5.12.2 · MC 26.3 · Fabric

View on Modrinth

Files

  • 5.12.3-SNAPSHOT+667

    beta

    5.12.3-SNAPSHOT+667

    26.326.226.1.226.1.1+44fabric

    2026-10-29 · 2.9K downloads

    ViaBackwards-5.12.3-SNAPSHOT.jar · 1.4 MB

  • 5.12.3-SNAPSHOT+667

    beta

    5.12.3-SNAPSHOT+667

    26.326.226.1.226.1.1+56foliapapervelocity

    2026-10-29 · 6.5K downloads

    ViaBackwards-5.12.3-SNAPSHOT.jar · 1.4 MB

  • 5.12.2

    release

    5.12.2

    26.326.226.1.226.1.1+44fabric

    2026-10-27 · 4.2K downloads

    ViaBackwards-5.12.2.jar · 1.4 MB

  • 5.12.2

    release

    5.12.2

    26.326.226.1.226.1.1+56foliapapervelocity

    2026-10-27 · 18.6K downloads

    ViaBackwards-5.12.2.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+665

    beta

    5.12.2-SNAPSHOT+665

    26.326.226.1.226.1.1+44fabric

    2026-10-27 · 456 downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+665

    beta

    5.12.2-SNAPSHOT+665

    26.326.226.1.226.1.1+56foliapapervelocity

    2026-10-27 · 837 downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+664

    beta

    5.12.2-SNAPSHOT+664

    26.326.226.1.226.1.1+56foliapapervelocity

    2026-10-27 · 176 downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+664

    beta

    5.12.2-SNAPSHOT+664

    26.326.226.1.226.1.1+44fabric

    2026-10-27 · 40 downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+663

    beta

    5.12.2-SNAPSHOT+663

    26.326.226.1.226.1.1+56foliapapervelocity

    2026-10-27 · 75 downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+663

    beta

    5.12.2-SNAPSHOT+663

    26.326.226.1.226.1.1+44fabric

    2026-10-27 · 28 downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+662

    beta

    5.12.2-SNAPSHOT+662

    26.326.226.1.226.1.1+44fabric

    2026-10-21 · 9.9K downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+662

    beta

    5.12.2-SNAPSHOT+662

    26.326.226.1.226.1.1+56foliapapervelocity

    2026-10-21 · 21.2K downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+660

    beta

    5.12.2-SNAPSHOT+660

    26.326.226.1.226.1.1+44fabric

    2026-10-18 · 5.6K downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+660

    beta

    5.12.2-SNAPSHOT+660

    26.326.226.1.226.1.1+56foliapapervelocity

    2026-10-18 · 8.8K downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+659

    beta

    5.12.2-SNAPSHOT+659

    26.326.226.1.226.1.1+44fabric

    2026-10-18 · 54 downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+659

    beta

    5.12.2-SNAPSHOT+659

    26.326.226.1.226.1.1+56foliapapervelocity

    2026-10-18 · 53 downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+658

    beta

    5.12.2-SNAPSHOT+658

    26.326.226.1.226.1.1+44fabric

    2026-10-12 · 17.7K downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+658

    beta

    5.12.2-SNAPSHOT+658

    26.326.226.1.226.1.1+56foliapapervelocity

    2026-10-12 · 22.2K downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+657

    beta

    5.12.2-SNAPSHOT+657

    26.326.226.1.226.1.1+44fabric

    2026-10-11 · 1.7K downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

  • 5.12.2-SNAPSHOT+657

    beta

    5.12.2-SNAPSHOT+657

    26.326.226.1.226.1.1+56foliapapervelocity

    2026-10-11 · 3.2K downloads

    ViaBackwards-5.12.2-SNAPSHOT.jar · 1.4 MB

Show more files (616 more)

Files are delivered unmodified from Modrinth's servers and verified against the SHA-512 hash published by the project. The project's license applies to every file; check it before redistributing.

About

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.