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Chunker
What it is
Chunker converts Minecraft worlds between Java Edition and Bedrock Edition, processing the worlds locally on the user's machine. It can carry over level settings and world data such as blocks, biomes, and tile entities, as well as multiple dimensions, containers, items, and in-game maps. It can also upgrade or downgrade worlds between supported game versions. Inputs include world folders, ZIP archives, and MCWORLD files, with drag-and-drop support. Conversion and export settings can be adjusted, and export settings can be saved for later conversions. Chunker includes a command-line interface for conversion and workflow integration; using it requires Java 17 or higher. Entities and player inventories are not converted, and structure data such as villages and strongholds is listed as unsupported or limited. Chunker is free and open source under the MIT license. It is available on Windows, macOS, Linux, and through a web interface. Supported version ranges vary by edition, so check that a world falls within them before converting.
For and against
For
- Converts worlds between Java and Bedrock editions.
- Processes worlds locally on the user's machine.
- Accepts folders, ZIP archives, and MCWORLD files.
- Conversion settings can be saved for later.
- Free and open source under the MIT license.
Against
- Entities are not converted.
- Player inventories are not converted.
- Some structure data is unsupported or limited.
- The CLI requires Java 17 or higher.
The verdict
Chunker covers a broad set of world data and offers both a graphical interface and CLI. Check version compatibility and its limits on entities, inventories, and structure data before converting.
Who it suits
Chunker suits Minecraft players who need to move worlds between Java and Bedrock editions or change a world’s game version. Its CLI and reusable export settings may also suit users integrating conversion into a workflow.
Plans and prices
Free
Java↔Bedrock conversion · desktop app and CLI · supported Minecraft versions
Read 19 Oct 2026 · chunker.app
On the record
- Advanced settings
- Users can adjust conversion settings and export settings for reuse in later conversions.chunker.app · read 3 Oct 2026
- Build requirements
- Building from source requires Git and Java 17 or newer, with Gradle optional.github.com · read 19 Oct 2026
- CLI
- Chunker includes a command-line interface that can be used for conversion and workflow integration.github.com · read 3 Oct 2026
- CLI requirement
- The CLI requires Java 17 or higher.github.com · read 3 Oct 2026
- CLI runtime
- The CLI requires Java 17 or newer.github.com · read 19 Oct 2026
- Command line
- Chunker includes ChunkerCLI for workflow integration.chunker.app · read 19 Oct 2026
- Company founding
- LinkedIn lists Hive Games as founded in 2013.uk.linkedin.com · read 19 Oct 2026
- Company size
- LinkedIn lists Hive Games as a privately held company with 11–50 employees.uk.linkedin.com · read 19 Oct 2026
- Conversion speed
- The homepage says a world can be converted in about 30 seconds.chunker.app · read 19 Oct 2026
- Converted data
- Supported conversion data includes level settings, blocks, biomes, tile entities, multiple dimensions, containers, items and in-game maps.learn.microsoft.com · read 19 Oct 2026
- Current release
- The GitHub releases page lists version 1.21.0, released October 2, 2026.github.com · read 3 Oct 2026
- Desktop platforms
- Microsoft documents standalone versions for Windows, macOS and Linux, alongside the command-line version.learn.microsoft.com · read 19 Oct 2026
- Entity limitation
- Entities and player inventories generally are not converted between editions.learn.microsoft.com · read 19 Oct 2026
- Extensibility
- CLI parameters support block, biome, dimension, world-setting, pruning and converter-mapping JSON inputs.github.com · read 19 Oct 2026
- Funding
- The repository states that Chunker receives funding from Mojang Studios.github.com · read 19 Oct 2026
- Independent review
- James A. Chambers praised the easy world and version conversion workflow but documented upload limits, queues and missing entities and inventories.jamesachambers.com · read 19 Oct 2026
- Input formats
- The application accepts a world folder, ZIP archive or MCWORLD file, including drag and drop.learn.microsoft.com · read 19 Oct 2026
- Inputs
- The app accepts world folders, ZIP archives and MCWORLD files, and can also accept drag-and-drop inputs.learn.microsoft.com · read 3 Oct 2026
