Minecraft: Java Edition ยท Patch release
Minecraft 1.21.10
1.21.10 was a hotfix that cleared seven issues left by The Copper Age. The fixes covered piston and powder snow entity behavior, wind charge collisions, chunk loading during teleports and maps placed on walls.
- Released
- Server needs
- Java 21
- Protocol
- 773
Seven days free, no card. Pick 1.21.10 when you create the server, or switch an existing one from the panel.
What changed in Minecraft 1.21.10
The fixes and changes of this release.
- Fixed entity behavior problems with pistons and powder snow
- Fixed inconsistent wind charge collisions introduced in 1.21.9
- Fixed chunk loading interrupted by player teleportation
- Fixed map placement on walls and command block teleport loops
- Fixed entities on bubble columns launching upward
- Compatible with 1.21.9 servers
Commands and technical
- Fixed command block teleportation loops
Running a Minecraft 1.21.10 server
What the release means for whoever runs the server.
- Requires Java SE 21
- Network protocol 773, compatible with 1.21.9 servers
- Data pack format 88.0
- Resource pack format 69.0
- Data version 4556
- Fixes chunk loading breaking during player teleportation
Before you update a world: take a backup. A world opened in 1.21.10 cannot be opened in an older version again. How backups work here.
1.21.10 on FadeHost
- The right Java, set for you
- A 1.21.10 server needs Java 21, and the panel starts it with a Java that fits. Nothing to install, nothing to pick.
- Server software for 1.21.10
- PaperPurpurVanillaFabricForgeNeoForge
- Who can join
- Players on 1.21.10 and on 1.21.9: the network protocol is the same.
Questions about 1.21.10
When was Minecraft 1.21.10 released?
Minecraft: Java Edition 1.21.10 was released on October 7, 2025.
What Java version does a Minecraft 1.21.10 server need?
Java 21. On FadeHost the server starts with the right Java for its Minecraft version on its own, so there is nothing to install or switch.
What did Minecraft 1.21.10 change?
1.21.10 was a hotfix that cleared seven issues left by The Copper Age. The fixes covered piston and powder snow entity behavior, wind charge collisions, chunk loading during teleports and maps placed on walls.
Can players on another version join a 1.21.10 server?
Players on 1.21.9 can: the network protocol (773) is the same. Any other version has to match the server, unless a Paper server runs plugins such as ViaVersion and ViaBackwards.
Can I update my world to Minecraft 1.21.10?
Yes. Take a backup, switch the server to 1.21.10 and start it: the world is converted on the first boot. A world opened in 1.21.10 cannot be opened in an older version again, so keep the backup until you are sure.
How do I start a Minecraft 1.21.10 server?
Create a server on FadeHost and pick 1.21.10 in the software list: Paper, Purpur, Vanilla, Fabric, Forge and NeoForge are there for this version. It is online in about a minute. The free tier runs a 2 GB server at no cost, and a paid server is sized to the RAM you need.
The release before
Minecraft 1.21.9 The Copper Age
September 30, 2025
The release after
Minecraft 1.21.11 Mounts of Mayhem
December 9, 2025
Read on
Change a server's version
Version, software and loader build are one setting in the panel.
Java version errors
What the wrong Java looks like in the console, and why it does not happen here.
RAM calculator
How much memory a server needs, sized from servers measured on our nodes.
Every Minecraft version
All releases, what each one added and the Java it needs.
Release facts from the Minecraft Wiki:Java Edition 1.21.10. Minecraft is a trademark of Mojang; FadeHost is not affiliated with Mojang or Microsoft.