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Release Java Edition Hotfix Patch of 1.21.9 The Copper Age

Minecraft 1.21.10

Released on 7 October 2025, Minecraft Java Edition 1.21.10 is a hotfix for 1.21.9 The Copper Age. It fixes 6 bugs, including entities in cobwebs clipping through pistons, chunks not loading during teleports and command blocks running /tp. It adds no new content.

Released 07 Oct 2025 Resource pack format 69 Data version 4556
Are my mods ready?

Key takeaways

  • Hotfix: 6 bugs fixed one week after The Copper Age (1.21.9), with no new content.
  • Pistons: entities in cobwebs and items pushed through powder snow or cobwebs no longer glitch.
  • Compatibility: same network protocol (773), data pack version (88.0) and resource pack version (69.0) as 1.21.9.

What changed

FixesEntities in cobwebs no longer clip through pistons (MC-211096).
FixesItems pushed through powder snow or cobwebs no longer glitch inside the piston head (MC-278182).
FixesWind charges behave as before again when they collide with certain blocks (MC-301916).
FixesChunks load again while the player is being teleported (MC-302321).
FixesMaps in item frames can again be placed on walls touching a carpeted floor (MC-302383).
FixesRepeating and chain command blocks running /tp keep the player on one spot again (MC-302405).

Source: official Java Edition 1.21.10 changelog

Mods & loaders for 1.21.10

Mods must be rebuilt for each version. Counts from the files published on Modrinth and CurseForge, in our catalog.

LoaderMods with a 1.21.10 fileLatest build
Fabric2000.20.1
NeoForge18321.10.64
Forge7260.1.18
Quilt70·
Shader loadersShaders with a 1.21.10 fileLatest build
Iris87·
OptiFine62·
Popular mods Sodium · AvailableJust Enough Items (JEI) · AvailableFabric API · AvailableLithium · AvailableIris Shaders · AvailableOptiFine · Available
226 mods in our catalog have a 1.21.10 file →

228 texture packs and 47 maps in our catalog support 1.21.10.

How to play 1.21.10

  1. 01

    Open the Minecraft Launcher and select Minecraft: Java Edition.

  2. 02

    Go to Installations, create a new installation and choose version 1.21.10.

  3. 03

    Back up your worlds before opening them in a new version.

From first snapshot to release

0 snapshots, 0 pre-releases and 1 release candidates over 5 days.

  1. 1.21.10-rc102 Oct 2025
  2. 1.21.1007 Oct 2025
All 1 test builds →

Minecraft 1.21.10 FAQ

When was Minecraft 1.21.10 released?

On 7 October 2025, one week after 1.21.9. It has no name of its own: it is a hotfix for The Copper Age.

Should I update to 1.21.10?

Yes, if you play 1.21.9: it fixes piston, teleport and command block bugs. In the Minecraft Launcher, select Latest Release and press Play.

Do 1.21.9 servers, worlds and packs work with 1.21.10?

Yes. Both versions use network protocol 773, data pack version 88.0 and resource pack version 69.0, so 1.21.9 data packs and resource packs keep working.

Which Java version does 1.21.10 need?

Java 21, as for 1.21.9. The Minecraft Launcher installs the right runtime automatically.