What this tool does
Pick the jar name, min/max RAM, GUI or not, restart loop or not, and whether to stick on the common G1 flag set. Download both Windows and Linux scripts.
Server & Files
Server Start Script Generator
Generate Windows start.bat and Linux start.sh for your Minecraft server jar. Set heap size and optional Aikar JVM flags.
Java process
Accept eula.txt before first start. Flags are a common starting point; tune for your host and Paper/Purpur version.
Generated scripts
===== start.bat ===== @echo off :start java -Xms2G -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 -Dusing.aikars.flags=https://mcflags.emc.gs -Daikars.new.flags=true -jar "server.jar" nogui echo Server stopped. Restarting in 5 seconds... timeout /t 5 goto start ===== start.sh ===== #!/usr/bin/env bash while true; do java -Xms2G -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 -Dusing.aikars.flags=https://mcflags.emc.gs -Daikars.new.flags=true -jar 'server.jar' nogui echo "Server stopped. Restarting in 5 seconds..." sleep 5 done
Server & Files
Minecraft Server Start Script Generator
Makes a start.bat and a start.sh so you are not rewriting the same java -Xmx line every time. Optional Aikar-style flags and a restart loop if you want them.
After you download
Accept eula first. Put the script next to the jar. On Linux you may need chmod +x start.sh. On Windows, double-click usually works if Java is on PATH.
Honest bit
Flags will not magically fix a bad host or fifty laggy plugins. They are a decent starting point. Watch Spark or timings after you go live.
Quick questions
Will flags fix TPS?
Sometimes they help a bit. They do not fix bad plugins or a weak CPU.
Paper / Purpur ok?
Yes. Just use the real jar filename.
Xms same as Xmx?
A lot of people do that so the heap does not keep resizing. Leave some RAM for the OS though.
Related tools
What do you think about this tool?
If something feels wrong, a Minecraft version is missing, the wording is confusing, or you have a better workflow idea, send it over. Real player feedback is how these tools get sharper.
Server & Files
Minecraft Server Start Script Generator
Makes a start.bat and a start.sh so you are not rewriting the same java -Xmx line every time. Optional Aikar-style flags and a restart loop if you want them.
What this tool does
Pick the jar name, min/max RAM, GUI or not, restart loop or not, and whether to stick on the common G1 flag set. Download both Windows and Linux scripts.
After you download
Accept eula first. Put the script next to the jar. On Linux you may need chmod +x start.sh. On Windows, double-click usually works if Java is on PATH.
Honest bit
Flags will not magically fix a bad host or fifty laggy plugins. They are a decent starting point. Watch Spark or timings after you go live.
Quick questions
Will flags fix TPS?
Sometimes they help a bit. They do not fix bad plugins or a weak CPU.
Paper / Purpur ok?
Yes. Just use the real jar filename.
Xms same as Xmx?
A lot of people do that so the heap does not keep resizing. Leave some RAM for the OS though.
Related tools
What do you think about this tool?
If something feels wrong, a Minecraft version is missing, the wording is confusing, or you have a better workflow idea, send it over. Real player feedback is how these tools get sharper.