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ViaVersion

ViaVersion

Mod and plugin

Allow newer clients to connect to older servers.

Client or server Utility

692.1k downloads
582 followers
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f612adb Rewrite player & display name in player info packet in 1.12.2->1.13 (#4550)

Fixes Tablist plugins on some servers breaking since the game profile name sent is used to determine the scoreboard team which name we rewrite in other packets, also adds missing component rewriter calls to the display names (Not that important given its only translation keys, but we are already here).

Co-authored-by: dewgs 23721849+dewgs@users.noreply.github.com

6716bee Remove arbitrary chat-nbt-fix config option in 1.11.1->1.12 (#4551)

d22b00e Add helper methods for registry entry rewriting

fe9ca49 Update mcstructs

e1837dc Fix legacy block picking on some Paper forks (#4496)

66eead2 Fix missing clouds in 1.21.5->1.21.6 (#4538)

937a2a2 Fix server links button not visible in 1.21.5->1.21.6 (#4536)

The Minecraft 1.21.6 client will only show the server links if the the server_links dialog has been sent

bee45ef Use Cache get instead of Map compute This may or may not fix concurrency issues from... somewhere (bad plugins/old guava impl?)

5.4.0

by kennytv on Jun 20, 2025
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Added 1.21.6 client support

  • Partially fixed item desyncs in 1.21.4->1.21.5
    • This also removed the linked Paper option that caused other (less severe) issues. However, not all item data can easily be handled, so some data on items like custom painting variants may still desync on the client when dragged in an inventory
  • Fixed invalid characters in command click events causing client errors in 1.21.4->.5 (by EnZaXD)
  • Fixed infinite respawning with 1.21.2+ clients on older servers (by RK_01)
  • Fixed boat steering issues on Fabric servers in 1.21->1.21.2 (by EnZaXD)
  • Fixed negative damage and repair cost values causing errors in 1.20.3->1.20.5 (by EnZaXD)
  • Ignore server-only creative slot lock and map post processing data in 1.20.3->1.20.5 (by EnZaXD)
  • Ignore unknown tags in block predicates in 1.20.3->1.20.5 (by EnZaXD)
  • Fixed some entity removal checks on respawn in 1.15-1.17 (by dewgs)
  • Fixed a regression causing container click errors in 1.8->1.9 (by EnZaXD)
  • Fixed non-standard chunk palette data reading of non-empty values with 0 bits (by EnZaXD)
  • Various fixes to text component conversion across versions (by kennytv, EnZaXD, ImGxrke)
  • Added suppress-text-component-conversion-warnings config option to suppress errors during these separetely to other conversion errors

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.

60c6765 Filter invalid characters in command click events in 1.21.4->.5 (#4528)

Minecraft versions prior to 1.21.4 filter out invalid characters when handling the click event on the clientside while 1.21.5+ validates and throws in the network codec per ExtraCodecs#CHAT_STRING

814190c Add missing dimension change checks for entity tracking (#4527)

Co-authored-by: FlorianMichael florian.michael07@gmail.com

04d647b Fix respawning with 1.21.2+ clients on older vanilla servers (#4509)

930bf67 Don't always send player inputs on Fabric servers in 1.21->1.21.2 (#4523)

51c3085 Validate tag identifiers in block predicates in 1.20.3->1.20.5 (#4522)

As usual, versions <= 1.20.4 have the entire parsing code in a try catch block while 1.20.5+ needs valid data.

Closes https://github.com/ViaVersion/ViaVersion/issues/4515

b981223 Make workflows manual runnable (#4521)