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ViaBackwards

ViaBackwards

Mod and plugin

Allow older Java Edition clients to connect to newer servers.

Client or server Utility

1.52M downloads
748 followers
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33d3b1d Round instead of truncating in toLegacyVelocity (#1272)

5255394 Track mid-game spectator gamemode change in 26.1->1.21.11 Fixes #1267

c5713f9 Move velocity explosion packet out of bounds in 1.21.2->1.21

e651e1c Update VV usage

c3f6271 Fix NPE in BlockRewriter1_20_2 when block entity has null tag (#1262)

bc7f360 Track gamemode in 1.20.5 protocol

5.9.1

by kennytv on May 4, 2026
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  • Fixed 26.1->1.21.11 advance_weather=false
  • Fixed 1.21.9->1.21.7 shouldered parrot tracking

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.

c4ac1b0 Add hashed item shortcut in 1.21.5->1.21.4

8ee6391 Remove ChunkLightStorage reflection

5361c01 Fix shouldered parrot tracking in 1.21.9->1.21.7 Fixes #1257

041f7f9 Fix toggled advance_time handling Fixes #1256

e46cf56 Cancel non-player bed sleep data in 1.14->1.13 (#1252)

ab9d1d2 Use TagRewriter in 1.14->1.13.2 (#1251)

65b2c30 Remove copper golem data in 1.21.9->1.21.7

5.9.0

by kennytv on Apr 19, 2026
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  • Added pass-original-item-name-to-resource-packs config option to put original item identifiers into custom data for use in resource packs (enabled by default; by mfishma)
  • Fixed spectate interact in 26.1->1.21.11
  • Fixed possible error for dimension data with empty attributes in 26.1->1.21.11 (by roggy666)
  • Fixed leather armor color rendering in inventories in 1.21.5->1.21.4 (by roggy666)
  • Fixed hashing of non-empty custom data on 1.21.5+ servers in 1.20.5->1.20.3
  • Fixed inventory desyncs in 1.17->1.16.5 (by JobsonMarinho)
  • Fixed possible disconnects from keepalive handling in 1.12->1.11
  • Updated some mappings in 1.21.9->1.21.7 (by mfishma)

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.

5194c27 Fix skull owner with multiple properties of the same key in 1.20.5->1.20.3 (#1248)

c887ab7 Improve 1.12 keep_alive handling Fixes handling of batches of keep alives and the technically possible collisions

63afb2d Fix inventory desync for <1.17 clients on 1.17+ servers (#1243)

External resources


Project members

kennytv

Maintainer

creeper123123321

Developer

florianreuth

Maintainer


Technical information

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