Minecraft 1.12-pre1

Pre-releaseLegacy 1.x

Minecraft 1.12-pre1 is a Java Edition pre-release released on 10 May 2017 under the classic 1.x numbering. Mojang lists Java 8 as the required runtime. It speaks network protocol 328.

Released: 10 May 2017
Requires Java: Java 8+
Protocol version: 328
Data version: 1132
Version group: 1.12
Numbering: Legacy (1.x)
Server software: 0 with builds
Position: #336 of 903

Official downloads

Served by Mojang. Verify the checksum before running anything.

File	Size	SHA-1	Download
Server jar	28.8 MB	`ebcafa3e1a33…`	piston-data.mojang.com ↗
Client jar	9.7 MB	`451d983529e7…`	piston-data.mojang.com ↗

The catalogue on 1.12-pre1

Projects that name 1.12-pre1 in their own release metadata. Follow any of these to the full filtered list.

Everything in 1.12

13 versions in this group.

Filter list

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-pre1

What Java version does Minecraft 1.12-pre1 require?

Minecraft 1.12-pre1 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-pre1 use?

Minecraft 1.12-pre1 speaks protocol 328. A client and a server can only connect when their protocol numbers match.

Where do I download the Minecraft 1.12-pre1 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 1.12-pre1Server software, loaders and the Java requirement in one place Java 8 downloadsVerified Temurin builds for Windows, macOS and Linux Everything in 1.12Snapshots, pre-releases and candidates in this group How 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.