PolarConverter
The Fabric Mod will Convert your Worlds into Polar
Screenshots
About this Mod
Polar ( hollow-cube/polar )
A world format for Minestom designed for simpler and smaller handling of small worlds, particularly for user generated content where size matters.
Minestom ( Minestom )
Minestom is an open-source library that enables developers to create their own Minecraft server software, without any code from Mojang.
Available Versions
How to Install PolarConverter on Your Server
Order Server
Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.10).
Install Mod
Open the mod browser in the dashboard and search for "PolarConverter". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.10, 1.21.9, 1.21.7 (+8 more)
Server-side
✓ RequiredRecommended RAM
6 GB(min. 4 GB)Frequently Asked Questions
PolarConverter 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 4 GB RAM is allocated and the loader matches the mod version (1.21.10). You can switch loaders with one click in the panel.
Is PolarConverter compatible with fabric?
PolarConverter officially supports fabric for Minecraft 1.21.10, 1.21.9, 1.21.7. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with PolarConverter – how to optimize performance?
Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if PolarConverter 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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Rent Modded Server
Install PolarConverter with just one click on your server.