No. 4 of 18 ·Minecraft World Converters

Java2Nukkit World Converter

Windows · Mac · Linux

Freedom report

Three barsScore 6.5

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely3 of 6 device platforms
DocumentedPlans, terms and facts published

Java2Nukkit World Converter is ranked #4 of 18 in Minecraft world converters on Freedom251. It runs on Linux, macOS, Windows. There is a free plan.

Java2Nukkit World Converter plans and pricing

All plans

MIT-licensed software Free Minecraft Java Edition 1.15.2 · optimized worlds required · Java 1.8+ github.com · 30 Sept 2026

Compared on Minecraft world converters

Free plan: Yes
Source editions: Minecraft Java Edition 1.15.2
Target editions: Nukkit Anvil world format
Java-Bedrock conversion: No
Version conversion: No
Format conversion: Yes
Preserves entities: No

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The record

Purpose: Converts Minecraft 1.15.2 Java Edition anvil worlds to Nukkit's anvil world format.
Command line: Runs from a terminal with a Java JAR and source and destination world directories.
Java requirement: Requires Java 1.8 or newer.
World requirement: Source worlds must be optimized using Minecraft 1.15.2; other versions or unoptimized worlds may convert incorrectly or crash.
Library API: Can be used as a library from Kotlin or Java, although its API is described as having no customizations.
Dependency distribution: The library is shared through JCenter with dependencies from SpigotMC and the orangy Maven repository.
Region selection: The API supports selecting regions for conversion, while leaving the filter unchanged converts everything.
Unsupported entities: No entities are converted except item frames, which are blocks in Bedrock Edition.
Dimension limit: Only overworld dimensions are supported; Nether and The End are not converted.
Head handling: Custom player heads are skipped by default and can be retained as regular Steve heads with the keep-custom-heads option or skipSkinHeads setting.
Compatibility handling: Unsupported blocks and items are replaced or removed because of Bedrock Edition or Nukkit limitations.
License: The MIT license grants use, copying, modification, publishing, distribution, sublicensing, and sale free of charge.
Warranty: The software is provided as-is without warranty, and the project disclaims responsibility for damage caused by the tool.
Support: Users are directed to open a GitHub issue for questions, which the README says will be replied to soon.
Price from: Free

Where it ranks on Freedom251

Best Minecraft World Converters in 2026#4 of 18

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Sources

github.com/PowerNukkit/Java2Nukkit-World-Converter· checked 30 Sept 2026
github.com/PowerNukkit/Java2Nukkit-World-Converter· checked 30 Sept 2026
github.com/PowerNukkit/Java2Nukkit-World-Converter· checked 30 Sept 2026