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PolarConverter

API—OSS—FREE—DOCS4/5
PO5.3#13 of 18
—Web—Windows—Mac—Linux—Android—iOS

Ranked in Minecraft World Converters ·No free plan on record

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About

PolarConverter is ranked #13 of 18 in Minecraft world converters on Inferse.

Compared on Minecraft world converters

Source editions
Minecraft Java Edition (Anvil)github.com
Target editions
Polar world formatgithub.com
Format conversion
Yesgithub.com

Facts

Purpose
PolarConverter is a Java command-line tool that converts Minecraft Java Edition worlds from Anvil format to Polar format for Minestom-based servers using the Polar engine.github.com · 4 Oct 2026
Full-world conversion
The converter can process an entire world.github.com · 4 Oct 2026
Partial conversion
An optional radius limits conversion to chunks within that radius of coordinates (0,0).github.com · 4 Oct 2026
Version requirement
The world’s DataVersion must match the Minestom server’s supported version; otherwise conversion stops with an error.github.com · 4 Oct 2026
Input requirements
The project requires Java 25+ and a Java Edition Anvil world containing a region folder and level.dat file.github.com · 4 Oct 2026
Conversion process
It starts a minimal offline Minestom server for block registries and NBT support, reads Anvil chunks, converts blocks and metadata, and writes a .polar file.github.com · 4 Oct 2026
Dependencies
The listed dependencies are Minestom, a Minecraft server library, and Polar, which provides Polar world format support.github.com · 4 Oct 2026
License
The project is licensed under the MIT License.github.com · 4 Oct 2026
Intended users
The project describes compatibility with Minestom-based servers and identifies Minecraft Java Edition Anvil worlds as its input.github.com · 4 Oct 2026
Maker profile
The GitHub profile describes its developer as focused on creating software, usually for Minecraft.github.com · 4 Oct 2026

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Where it ranks on Inferse

Sources