Chunker

The full write-up

Overview Chunker is a free Minecraft world converter for Java Edition and Bedrock Edition, suited to players and communities moving worlds between editions or game versions. Its broad coverage of world data and local processing make it a capable migration tool, but missing entities, inventories and some structure data can rule it out for worlds that rely on them. Key features Edition and version conversion Chunker converts worlds between Java and Bedrock, and can upgrade or downgrade them within supported releases. It accepts Bedrock 1.12.0–1.26.50 and Java 1.8.8–1.21.11 and 26.1–26.3. That range accommodates many older and current worlds, but users should confirm both their source and target versions fall within it before relying on a conversion. World data and inputs Conversions can carry level settings, blocks, biomes, tile entities, multiple dimensions, containers, items and in-game maps. Worlds can be opened from folders, ZIP archives or MCWORLD files, with drag and drop supported. Processing stays on the user's machine, a practical advantage for communities that prefer not to send world files to a remote service. The omissions matter: Chunker does not convert entities or player inventories, and structure data such as villages and strongholds is unsupported or limited. It is therefore a stronger fit for moving terrain and general world content than for preserving every detail of an active world. Reusable settings and CLI Conversion and export settings can be adjusted and saved for later use, which helps when repeating a consistent workflow across several worlds. A command-line interface supports conversion and workflow integration, but requires Java 17 or higher. The interface, desktop platforms and CLI offer useful flexibility; the Java requirement is an extra setup constraint for automated use. Chunker is open source under the MIT license, with its code on GitHub. Hive Games describes it as an internal tool offered free to Minecraft partners and the public under an exclusive licensing deal with Microsoft. Pricing Free — free. The plan covers Java and Bedrock world conversion and has no trial or paid tier to weigh against it. It suits individual players and communities that need supported conversions without a software cost. The trade-off is not a lower plan's quota or seat cap, but the conversion limits themselves: unsupported data and version ranges may require a different tool or extra follow-up. Platforms Chunker supports Windows, macOS, Linux and a web interface, as well as a Java CLI. The broad platform choice suits mixed-device communities; CLI users need Java 17 or higher. Region editing is supported, while entity editing is not. Who it's for Chunker is best for players, creators and server communities that need to move a world between Java and Bedrock, change its version, or bring supported terrain and items along while keeping processing local. It is less suitable when preservation of entities, player inventories or complex structures is essential. Pros and cons Pros: Converts between both Minecraft editions and supports upgrades and downgrades across substantial version ranges, giving migration work more flexibility than a single-version export. Pros: Handles varied world data and common archive formats, with reusable settings for repeat conversions. Pros: Local processing, multiple platform options and an MIT license give users control over where conversion runs and how the code is used. Cons: Entities and player inventories do not convert, and villages, strongholds and other structure data may be unsupported or limited; worlds depending on those elements need extra work. Cons: The CLI requires Java 17 or higher, which adds a dependency to scripted workflows. Alternatives For a broader selection of Minecraft world editing tools, browse Minecraft world editors . Choose CurseForge instead when the goal is finding free Minecraft mods and modpacks through a web catalog rather than converting worlds. MCBE Inventory Editor is a free alternative. biomed is free and MIT-licensed; MCA Selector is also free and has Windows, macOS, Linux and universal JAR builds. Minecraft Region Fixer is a free GPL-3.0 tool that requires Python 3.x. Minecraft World Trimmer is free under MIT and provided as-is without warranty. WorldPainter is free and open source under GPL version 3. Bedrock Toolchest is free on Linux and Windows, with no paywalls, subscriptions or account requirement. Verdict Choose Chunker when you need a free, locally processed route between Java and Bedrock worlds, or across supported game versions, and the data you need to preserve is within its scope. Its breadth, reusable settings and CLI make it a strong conversion choice; look elsewhere or plan manual follow-up if entities, player inventories or structure data are central to the world.