Free Minecraft Server Tools

Small, free tools built on MCJarHub's version data. No sign-up, no tracking — every result has a shareable URL.

Start script generatorBuild a start.bat, start.sh, systemd unit or Docker command for any server jar: RAM, Aikar's flags, Java check and auto-restart.

Which server jar should I use?Answer five questions and get the right server software — vanilla, Paper, a mod loader, a hybrid or a proxy — with links.

Jar hash lookupPaste a SHA-256, SHA-1 or MD5 and find out which server software, version and build the file is — or that it is unknown.

Minecraft server RAM calculatorA rule-of-thumb memory suggestion for your server type, players and machine, with the matching -Xms/-Xmx values.

Server software version support matrixWhich server software has builds for each Minecraft version, and how fast each project shipped its first build after Mojang's release.

JSON APIEvery version, checksum and download link as JSON — plus ServerJars-compatible routes and a shields.io badge endpoint.