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Minecraft 23w43b

SnapshotLegacy 1.x

Minecraft 23w43b is a Java Edition snapshot released on 26 Oct 2023 under the classic 1.x numbering. Mojang lists Java 17 as the required runtime. It speaks network protocol 1073741984.

Official artwork published by Mojang for Minecraft 23w43b

Minecraft Snapshot 23w43b

We're now releasing a second snapshot for the week to fix some crashes. Bug Fixes Fixed a crash on server startup Fixed a crash when leaving the "Configure Realm" screen
Image and summary: Mojang Studios, from the official Java Edition patch notes. Not affiliated with Mojang.
Released
26 Oct 2023
Requires Java
Java 17+
Protocol version
1073741984
Data version
3687
Version group
23w
Numbering
Legacy (1.x)
Server software
0 with builds
Position
#713 of 903

Official downloads

Served by Mojang. Verify the checksum before running anything.

FileSizeSHA-1Download
Server jar46.4 MBe7f9a4ca5ad3…piston-data.mojang.com ↗
Client jar22.7 MB0d1d222d568d…piston-data.mojang.com ↗

The catalogue on 23w43b

Projects that name 23w43b in their own release metadata. Follow any of these to the full filtered list.

What runs on 23w43b

Builds are counted from each project's own API; declared support comes from the loader's metadata.

Full compatibility
SoftwareLatest buildPublishedChecksumDownload
Fabric Loader0.19.3Not build baseddeclaredloader
Quilt Loader0.30.1-beta.2Not build baseddeclaredloader

Everything in 23w

25 versions in this group.

Filter list
VersionTypeProtocolReleased
23w51bSnapshot107374199418 Dec 2023
23w51aSnapshotUnknown18 Dec 2023
23w46aSnapshot107374198716 Nov 2023
23w45aSnapshot10737419868 Nov 2023
23w44aSnapshot10737419851 Nov 2023
23w43bSnapshot107374198426 Oct 2023
23w43aSnapshot107374198325 Oct 2023
23w42aSnapshot107374198118 Oct 2023
23w41aSnapshot107374198011 Oct 2023
23w40aSnapshot10737419784 Oct 2023
23w35aSnapshot107374197130 Aug 2023
23w33aSnapshot107374197017 Aug 2023
23w32aSnapshotUnknown9 Aug 2023
23w31aSnapshotUnknown1 Aug 2023
23w18aSnapshotUnknown3 May 2023
23w17aSnapshotUnknown26 Apr 2023
23w16aSnapshotUnknown20 Apr 2023
23w14aSnapshotUnknown5 Apr 2023
23w13aSnapshotUnknown29 Mar 2023
23w12aSnapshotUnknown22 Mar 2023
23w07aSnapshotUnknown15 Feb 2023
23w06aSnapshotUnknown8 Feb 2023
23w05aSnapshotUnknown1 Feb 2023
23w04aSnapshotUnknown24 Jan 2023
23w03aSnapshot107374193918 Jan 2023

Questions about Minecraft 23w43b

What Java version does Minecraft 23w43b require?

Minecraft 23w43b requires Java 17 or newer. Mojang publishes this in the version metadata, so an older runtime refuses to start it.

What protocol version does Minecraft 23w43b use?

Minecraft 23w43b speaks protocol 1073741984. A client and a server can only connect when their protocol numbers match.

Where do I download the Minecraft 23w43b server jar?

Mojang hosts it directly. This page links to the official file with its SHA-1 checksum and size, so you can verify the download before you run it. We do not mirror or repackage it.

Go deeper

Full compatibility for 23w43bServer software, loaders and the Java requirement in one placeJava 17 downloadsVerified Temurin builds for Windows, macOS and LinuxEverything in 23wSnapshots, pre-releases and candidates in this groupHow Minecraft version numbers workWhy 1.21 was followed by 26.1, and what happened to 1.22

Metadata from Mojang’s official version manifest. Protocol and data versions from the PrismarineJS minecraft-data project.