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Minecraft 1.21.3

Finished, fully supported build — this is what the launcher gives you. Full source data for this version is extracted and browsable below.

2,609 names shipped in this version. Each result opens the wiki page for that thing.

Contents (5)
  1. What changed in 1.21.3
  2. Fixes
  3. Version facts
  4. Browse this version
  5. Neighbouring versions

Java What changed in 1.21.3

Everything below is measured by comparing the game files of 1.21.2 with 1.21.3 — not copied from patch notes.

Fixes 2

Read from Mojang’s own release notes for Minecraft: Java Edition 1.21.3, published 2024-10-23. Every entry keeps its original bug ID.

2 issues fixed, read from Mojang’s own patch notes. Each entry keeps its original bug ID.

Fixed bugs in 1.21.3 2

  • MC-277791 Attempting to join a Realm with a Resource Pack enabled fails with an error
  • MC-277779 Salmon from 1.21.1 or before shrink when updating to 1.21.2

Version facts

EditionJava Edition
TypeStable release
Release date23 October 2024
Protocol version768
Data version4082
Resource pack format42
Data pack format57
Minimum Java versionJava 21
Asset index18
Client jar26.6 MB sha1 6f67d19b4467…
Server jar53.5 MB sha1 45810d238246…
Previous1.21.2
Next24w44a
Official metadata1.21.3.json
PlatformsWindows macOS Linux
Written inJava
DeveloperMojang Studios
Mojang's name for itMinecraft: Java Edition 1.21.3
Registries extracted80
Blocks1084
Display strings6972

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Neighbouring versions

← 1.21.2 (previous)24w44a (next) →