Minecraft 21w05b
SnapshotLegacy 1.xMinecraft 21w05b is a Java Edition snapshot released on 4 Feb 2021 under the classic 1.x numbering. Mojang lists Java 8 as the required runtime. It speaks network protocol 1073741837.
Minecraft Snapshot 21w05b
Snapshot 21w05b is a small snapshot to address a couple of bugs. Fixed bugs in 21w05b MC-203813 Copper blocks are named inconsistently MC-213788 The game can randomly freeze MC-213802 Copper is not upgraded correctly from pre-21w05a worlds
- Released
- 4 Feb 2021
- Requires Java
- Java 8+
- Protocol version
- 1073741837
- Data version
- 2692
- Version group
- 21w
- Numbering
- Legacy (1.x)
- Server software
- 0 with builds
- Position
- #558 of 903
Official downloads
Served by Mojang. Verify the checksum before running anything.
| File | Size | SHA-1 | Download |
|---|---|---|---|
| Server jar | 36.7 MB | f92547a92214… | piston-data.mojang.com ↗ |
| Client jar | 17.6 MB | 8230cf2349b4… | piston-data.mojang.com ↗ |
The catalogue on 21w05b
Projects that name 21w05b in their own release metadata. Follow any of these to the full filtered list.
What runs on 21w05b
Builds are counted from each project's own API; declared support comes from the loader's metadata.
| Software | Latest build | Published | Checksum | Download |
|---|---|---|---|---|
| Fabric Loader | 0.19.3 | Not build based | declared | loader |
| Quilt Loader | 0.30.1-beta.2 | Not build based | declared | loader |
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 21w05b
What Java version does Minecraft 21w05b require?
Minecraft 21w05b requires Java 8 or newer. Mojang publishes this in the version metadata, so an older runtime refuses to start it.
What protocol version does Minecraft 21w05b use?
Minecraft 21w05b speaks protocol 1073741837. A client and a server can only connect when their protocol numbers match.
Where do I download the Minecraft 21w05b 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.