MCVersions.net
The easiest way to find and download any and all Minecraft versions!
1.21.3 is a hotfix to Java Edition, released on October 23, 2024, which fixes critical bugs related to joining Realms with resource packs and a bug related to salmon size. It is compatible with 1.21.2 servers.
Browse the full Minecraft 1.21.3 item ID list and /give command generator.
Released 2024-10-23
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MCVERSIONS
You'll need the proper technical setup and configuration to run your own server. If you're not comfortable with this, we recommend using Nodecraft for a hassle-free experience.If you understand and wish to proceed, you can download the jar files below.
Start your own server!