Minecraft 26.x: What Is New in 2026?

Minecraft 26.x is the latest major version of Minecraft Java Edition. With significant changes to both the game and technical requirements, it is important to know what has changed and what that means for your server.

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What is new?

Minecraft 26.x contains various new features and improvements over the 1.21.x series:

• New version numbering system (from 1.21.x to 26.x).
• Improved rendering and performance optimizations.
• New biomes, blocks, and mobs.
• Changes to world generation.
• Updated data packs and resource packs.

Java 25 requirement

Minecraft 26.1+ requires Java 25. This is a major change that affects all server administrators:

# Install Java 25 (Ubuntu/Debian)
apt install openjdk-25-jre-headless

# Check your Java version
java -version

If you use Paper or Purpur, make sure you download the latest builds compatible with Java 25.

Updating your server to 26.x

1. Create a backup: make a full backup of your server, including worlds and plugins. Read our backup guide.
2. Update Java: install Java 25 on your server.
3. Update server JAR: download the latest Paper or Purpur build for 26.x.
4. Check plugins: not all plugins are immediately compatible. Check if your plugins support 26.x.
5. Test on a test server: run the update on a test environment first before updating the production server.

Plugin compatibility

Most major plugins publish builds for each 26.x drop, but not always on day one. For the newest drop, 26.3 (September 15, 2026), check each plugin page: WorldEdit, for example, supports 26.3 in a beta build (status October 6, 2026).

Smaller or niche plugins may need more time. Check the SpigotMC or Modrinth page for each plugin.

Aikar's Flags for 26.x

Aikar's recommended JVM flags still work with Java 25:

java -Xms4G -Xmx4G -XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:+AlwaysPreTouch -XX:G1NewSizePercent=30 -XX:G1MaxNewSizePercent=40 -XX:G1HeapRegionSize=8M -XX:G1ReservePercent=20 -XX:G1HeapWastePercent=5 -XX:G1MixedGCCountTarget=4 -XX:InitiatingHeapOccupancyPercent=15 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:SurvivorRatio=32 -XX:+PerfDisableSharedMem -XX:MaxTenuringThreshold=1 -jar server.jar nogui

World conversion

Existing worlds from 1.21.x are automatically converted when loaded in 26.x. This process can take a while for large worlds. The conversion is one-way: you cannot go back to 1.21.x after opening in 26.x. Always make a backup first.

Should I update to 26.x right away?

Not necessarily. If all your plugins work and your players want the latest features, update. If you depend on plugins that are not yet updated, wait until they are compatible. Many servers deliberately run one version behind until everything is stable.

Can I run 26.x on a game hosting panel?

Yes. At HostValues, you can select the Minecraft version in the Pterodactyl panel. Java 25 is available as a Docker image under Startup; select it for 26.x servers.

Do mods work with 26.x?

Fabric and NeoForge support 26.x. Forge mods must be specifically compiled for 26.x. Always check if your mods support the correct version.

Update your server to Minecraft 26.x at HostValues Minecraft hosting with Java 25 and the latest Paper builds.