
JLine for Dedicated Server
A server side mod to enable command history, auto completion and syntax highlighting on the server console
About this Mod
A server side mod to enable command history, auto completion and syntax highlighting on the server console, somewhat similar to the chat console in the game or the Spigot server console. Should have zero impact on the gameplay.
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This mod is configured via jline4mcdsrv.toml in the config folder:
logPatternis the pattern used for Log4j 2 (documentation found here)highlightColorsis a list of colors used to highlight parameters in order (as seen in the image above)
PSA: Since Minecraft 1.17 the (0.6.2 doesn't require this anymore).-Dlog4j.skipJansi=false command line argument is needed for %style/%highlight log output
This mod only works if the server is started with the 'nogui' option. There's no plan to add support for the GUI server.
Note: The original author of this mod is chirs241097 and the project is also found on CurseForge. I've been maintaining this mod for a while and Chris allowed me to bring the mod to Modrinth too!
Available Versions
How to Install JLine for Dedicated Server on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (26.1.2).
Install Mod
Open the mod browser in the dashboard and search for "JLine for Dedicated Server". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.1.2, 26.1.1, 26.1 (+36 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
JLine for Dedicated Server server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (26.1.2). You can switch loaders with one click in the panel.
Is JLine for Dedicated Server compatible with fabric?
JLine for Dedicated Server officially supports fabric for Minecraft 26.1.2, 26.1.1, 26.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with JLine for Dedicated Server – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if JLine for Dedicated Server consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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