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Minecraft 23w40a

SnapshotLegacy 1.x

Minecraft 23w40a is a Java Edition snapshot released on 4 Oct 2023 under the classic 1.x numbering. Mojang lists Java 17 as the required runtime. It speaks network protocol 1073741978.

Official artwork published by Mojang for Minecraft 23w40a

Minecraft Snapshot 23w40a

We are now releasing Snapshot 23w40a, the first snapshot for 1.20.3! This snapshot contains improvements for shields, changes to chat component serialization and bug fixes.
Image and summary: Mojang Studios, from the official Java Edition patch notes. Not affiliated with Mojang.
Released
4 Oct 2023
Requires Java
Java 17+
Protocol version
1073741978
Data version
3679
Version group
23w
Numbering
Legacy (1.x)
Position
#709 of 920

Official downloads

Served by Mojang. Verify the checksum before running anything.

FileSizeSHA-1Download
Server jar46.2 MB0f51a81705f4…piston-data.mojang.com ↗
Client jar22.3 MB8b5067a18632…piston-data.mojang.com ↗

The catalogue on 23w40a

Projects that name 23w40a in their own release metadata. Follow any of these to the full filtered list.

Mod loaders

Support declared in each loader's own metadata.

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 23w40a

What Java version does Minecraft 23w40a require?

Minecraft 23w40a requires Java 17 or newer. Mojang publishes this in the version metadata, and an older runtime refuses to start it.

What protocol version does Minecraft 23w40a use?

Minecraft 23w40a speaks protocol 1073741978. A client and a server can only connect when their protocol numbers match.

Where do I download the Minecraft 23w40a 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 23w40aServer 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.

Is this information wrong or missing something? .