Minecraft 21w40a
SnapshotLegacy 1.xMinecraft 21w40a is a Java Edition snapshot released on 7 Oct 2021 under the classic 1.x numbering. Mojang lists Java 16 as the required runtime. It speaks network protocol 1073741868.
Minecraft Snapshot 21w40a
Badabee badablurb. We still highly recommend backing up your world before loading it in this snapshot.
- Released
- 7 Oct 2021
- Requires Java
- Java 16+
- Protocol version
- 1073741868
- Data version
- 2838
- Version group
- 21w
- Numbering
- Legacy (1.x)
- Position
- #590 of 920
Official downloads
Served by Mojang. Verify the checksum before running anything.
| File | Size | SHA-1 | Download |
|---|---|---|---|
| Server jar | 37.9 MB | 84496ec4beee… | piston-data.mojang.com ↗ |
| Client jar | 18.9 MB | b88eecb40a4b… | piston-data.mojang.com ↗ |
The catalogue on 21w40a
Projects that name 21w40a in their own release metadata. Follow any of these to the full filtered list.
Mod loaders
Support declared in each loader's own metadata.
- Quilt Loader0.31.0-beta.4declaredsupported
- Fabric Loader0.20.1declaredsupported
Everything in 21w
25 versions in this group.
| Version | Type | Protocol | Released |
|---|---|---|---|
| 21w44a | Snapshot | 1073741872 | 3 Nov 2021 |
| 21w43a | Snapshot | 1073741871 | 27 Oct 2021 |
| 21w42a | Snapshot | 1073741870 | 20 Oct 2021 |
| 21w41a | Snapshot | 1073741869 | 13 Oct 2021 |
| 21w40a | Snapshot | 1073741868 | 7 Oct 2021 |
| 21w39a | Snapshot | 1073741867 | 29 Sept 2021 |
| 21w38a | Snapshot | 1073741866 | 23 Sept 2021 |
| 21w37a | Snapshot | 1073741865 | 15 Sept 2021 |
| 21w20a | Snapshot | 1073741852 | 19 May 2021 |
| 21w19a | Snapshot | 1073741851 | 12 May 2021 |
| 21w18a | Snapshot | 1073741850 | 5 May 2021 |
| 21w17a | Snapshot | 1073741849 | 28 Apr 2021 |
| 21w16a | Snapshot | 1073741847 | 21 Apr 2021 |
| 21w15a | Snapshot | 1073741846 | 14 Apr 2021 |
| 21w14a | Snapshot | 1073741845 | 7 Apr 2021 |
| 21w13a | Snapshot | 1073741844 | 31 Mar 2021 |
| 21w11a | Snapshot | 1073741843 | 17 Mar 2021 |
| 21w10a | Snapshot | 1073741842 | 10 Mar 2021 |
| 21w08b | Snapshot | 1073741841 | 25 Feb 2021 |
| 21w08a | Snapshot | 1073741840 | 24 Feb 2021 |
| 21w07a | Snapshot | 1073741839 | 17 Feb 2021 |
| 21w06a | Snapshot | 1073741838 | 10 Feb 2021 |
| 21w05b | Snapshot | 1073741837 | 4 Feb 2021 |
| 21w05a | Snapshot | 1073741836 | 3 Feb 2021 |
| 21w03a | Snapshot | 1073741835 | 20 Jan 2021 |
Questions about Minecraft 21w40a
What Java version does Minecraft 21w40a require?
Minecraft 21w40a requires Java 16 or newer. Mojang publishes this in the version metadata, and an older runtime refuses to start it.
What protocol version does Minecraft 21w40a use?
Minecraft 21w40a speaks protocol 1073741868. A client and a server can only connect when their protocol numbers match.
Where do I download the Minecraft 21w40a 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
Metadata from Mojang’s official version manifest. Protocol and data versions from the PrismarineJS minecraft-data project.
Is this information wrong or missing something? .