Minecraft 1.12.1
ReleaseLegacy 1.xMinecraft 1.12.1 is a Java Edition full release released on 3 Aug 2017 under the classic 1.x numbering. Mojang lists Java 8 as the required runtime. It speaks network protocol 338.
- Released
- 3 Aug 2017
- Requires Java
- Java 8+
- Protocol version
- 338
- Data version
- 1241
- Version group
- 1.12
- Numbering
- Legacy (1.x)
- Server software
- 3 with builds
- Position
- #346 of 903
Official downloads
Served by Mojang. Verify the checksum before running anything.
| File | Size | SHA-1 | Download |
|---|---|---|---|
| Server jar | 28.8 MB | 561c7b2d54ba… | piston-data.mojang.com ↗ |
| Client jar | 9.7 MB | 83385d346cf7… | piston-data.mojang.com ↗ |
The catalogue on 1.12.1
Projects that name 1.12.1 in their own release metadata. Follow any of these to the full filtered list.
What runs on 1.12.1
Builds are counted from each project's own API; declared support comes from the loader's metadata.
| Software | Latest build | Published | Checksum | Download |
|---|---|---|---|---|
| Paper | #1204 | 14 Sept 2017 | dba2219d674a… | jar ↗ |
| Spigot | #1399 | 29 Aug 2018 | Not published | jar ↗ |
| Sponge | #22 | 28 Jul 2026 | Not published | jar ↗ |
| Spigot | #1399 | Not build based | inferred | loader |
| Sponge | 1.12.1-7.0.0-BETA-329 | Not build based | inferred | loader |
| Minecraft Forge | 14.22.1.2478 | Not build based | declared | loader |
Everything in 1.12
13 versions in this group.
| Version | Type | Protocol | Released |
|---|---|---|---|
| 1.12.2 | Release | 340 | 18 Sept 2017 |
| 1.12.2-pre2 | Pre-release | 339 | 15 Sept 2017 |
| 1.12.2-pre1 | Pre-release | 339 | 13 Sept 2017 |
| 1.12.1 | Release | 338 | 3 Aug 2017 |
| 1.12.1-pre1 | Pre-release | 337 | 2 Aug 2017 |
| 1.12 | Release | 335 | 2 Jun 2017 |
| 1.12-pre7 | Pre-release | 334 | 31 May 2017 |
| 1.12-pre6 | Pre-release | 333 | 29 May 2017 |
| 1.12-pre5 | Pre-release | 332 | 19 May 2017 |
| 1.12-pre4 | Pre-release | 331 | 18 May 2017 |
| 1.12-pre3 | Pre-release | 330 | 17 May 2017 |
| 1.12-pre2 | Pre-release | 329 | 11 May 2017 |
| 1.12-pre1 | Pre-release | 328 | 10 May 2017 |
Questions about Minecraft 1.12.1
What Java version does Minecraft 1.12.1 require?
Minecraft 1.12.1 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 1.12.1 use?
Minecraft 1.12.1 speaks protocol 338. A client and a server can only connect when their protocol numbers match.
Where do I download the Minecraft 1.12.1 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.
Which server software supports Minecraft 1.12.1?
Paper, Spigot, Sponge publish builds for 1.12.1. Each one is listed with its build number and checksum.
Go deeper
Metadata from Mojang’s official version manifest. Protocol and data versions from the PrismarineJS minecraft-data project.