Minecraft 1.21-rc1 Update - What's New
Release candidate for Tricky Trials. Final testing build before the full release. Only critical bug fixes expected from this point.
Overview
Minecraft 1.21-rc1 is a release candidate for Minecraft: Java Edition, published on June 10, 2024. A release candidate is the last checkpoint before launch: if no critical issues surface, the same build typically ships as the full version. This candidate records 3 changes.
The work in this update spans bug fixes. On the bug fixes side it addresses final crash reported in pre-release 3 and text rendering in trial spawner UI. It also resolves 3 reported bugs, which is typical maintenance work that keeps worlds and servers stable.
This build is part of the development cycle leading to 1.21 (Tricky Trials). Treat it as a preview rather than a destination: features can change, be renamed, or be cut entirely before they reach the stable release, so it is meant for testing and feedback, not for your main world or a live server.
Changes
#Bug Fixes(3)
- Fixed final crash reported in pre-release 3
- Fixed text rendering in trial spawner UI
- Minor localization corrections
Server Admin Migration Guide
- Release candidate - near-final build
- Suitable for final plugin compatibility testing
What This Means
For players
A release candidate is essentially the finished update on trial. You can use 1.21-rc1 to get an early, stable-feeling look at what is coming, but only the official release should be trusted for long-term worlds.
For server admins
Do not run 1.21-rc1 on a public server. Development builds like this exist so you can test plugins and mods ahead of launch, not to host players. Spin up a private staging instance, confirm your plugins load, and report regressions while there is still time to fix them before release.
Background & Context
- Release candidates arrive at the tail end of a development cycle and are aimed at mod and plugin authors who need to test against a near-final build.
- This build was preparing the launch of 1.21.
- Always keep a backup of important worlds before changing versions; the Astroworld versions database tracks client and server compatibility for 1.21-rc1.
Frequently Asked Questions
When was Minecraft 1.21-rc1 released?
Minecraft 1.21-rc1 was released on June 10, 2024 as a release candidate for Minecraft: Java Edition.
What is new in 1.21-rc1?
Release candidate for Tricky Trials. Final testing build before the full release. Only critical bug fixes expected from this point. Notable entries include: Fixed final crash reported in pre-release 3; Fixed text rendering in trial spawner UI; Minor localization corrections. In total it documents 3 changes across 1 category.
Should I use 1.21-rc1 on my main world?
No. 1.21-rc1 is a release candidate meant for testing. Keep your main world on the latest stable release and only open a backup copy in a separate test world to try the new content.
Can I run 1.21-rc1 on a Minecraft server?
It is not recommended for a public server. Release candidate - near-final build. Use a private staging instance to test plugins and mods, not to host players.
Which Minecraft version is 1.21-rc1 a preview of?
1.21-rc1 is part of the development cycle for 1.21, the update known as Tricky Trials. Features shown here are still in progress and may change before the final release.
Looking for version compatibility info?
Check client and server version details on our versions database.