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Mineforgian

ViaBackwards

Allow older Java Edition clients to connect to newer servers.

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1.9M
Подписчики
806
Обновлён
5 августа 2026 г.
Лицензия
GPL-3.0-only

Опубликован 10 августа 2023 г.

Исходный кодСообщить об ошибке

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.

Ченджлог

5.12.0-SNAPSHOT+621Бета26.1.1, 26.1.2, 26.2 · 5 августа 2026 г.

4ad05a4 Update VV usage

5.11.1-SNAPSHOT+620Бета26.1.1, 26.1.2, 26.2 · 29 июля 2026 г.

8fb4660 Fix held block rewriting in 1.13->1.12 Fixes #1303

5.11.1-SNAPSHOT+619Бета26.1.1, 26.1.2, 26.2 · 29 июля 2026 г.

799d894 Remove warning when trying to open stonecutter

5.11.1-SNAPSHOT+618Бета26.1.1, 26.1.2, 26.2 · 23 июля 2026 г.

4bc4a4c Flip respawn_anchor_works default Fixes #1302

5.11.1-SNAPSHOT+616Бета26.1.1, 26.1.2, 26.2 · 18 июля 2026 г.

ef665d2 Prevent Mannequin names from having formatting in 1.12.2 (#1298)

5.11.1-SNAPSHOT+615Бета26.1.1, 26.1.2, 26.2 · 16 июля 2026 г.

8fc519b Clean up build scripts

5.11.0Релиз26.1.1, 26.1.2, 26.2 · 12 июля 2026 г.
  • New items and entities now show their names as translatable components instead of string text and can be changed via resource packs
    • Entities use vb.entity.<type>, e.g. vb.entity.sulfur_cube, which falls back to 26.2 Sulfur Cube as before. entitynames has been removed from mapping files
    • Items use vb.item.<type>, e.g. vb.item.sulfur, which falls back to 26.2 Sulfur as before. itemnames has been removed from mapping files
    • Custom model data for new items has been moved to custom_model_data in the mapping files and starts at 0 for the first 1.13 item, going upwards across every protocol (currently ending at 937). 1.21.4+ clients have their original item identifier added to the custom_model_data string list, and all client versions have the custom model data from the mapping files added (either to the new float list or the old single-int tag)
  • On 1.21.5+ servers, handling of items sent by the client now mostly skips from 1.20.4 to 1.21.5 to avoid heavy item reading and transformation code
    • If your server is on a version between 1.20.5 and 1.21.4, it is highly recommended you update to 1.21.5 or higher
  • Fixed multi-line text displays in 1.19.4->1.19.3
  • Fixed disconnects when using new environment attributes in custom dimensions
  • Fixed invisible beds in 26.2->26.1 (by booky10)
  • Fixed code of conduct writing in 1.21.9->1.21.7
  • Fixed baby happy ghast scale in 1.21.6->1.21.5 and baby squid and dolphin scale in 1.21.2->1.21 (by mfishma)
  • Fixed creative mode inventory clear action in 1.21.2->1.21
  • Fixed 1.20.1 disconnect from new 26.2 sulfur cube archetype registry (by EnZaXD)
  • Fixed 1.13->1.12 comparator mapping
  • Fixed console warning about invalid sulfur_cubes legacy biome mapping

If you want to get larger version updates early, consider supporting me via https://viaversion.com/donate. See the previous update notes for more info.

5.11.0-SNAPSHOT+613Бета26.1.1, 26.1.2, 26.2 · 12 июля 2026 г.

59860eb Fix manual blockstates-1.13 loading

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