BSAOpt vs Chunker
BSAOpt
github.com
Chunker
chunker.appSide by side
| Figure | BSAOpt | Chunker |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| API | — | Yes |
| Plans published | 1 | 1 |
| Spec score · Game Modding Tools | 7.8 (#9) | 9.0 (#1) |
| License | The source file states it is available under either the Mozilla Public License 1.1 or GNU Library GPL version 3 terms. | The repository is released under the MIT license. |
| Maker | The repository identifies Ethatron as the project owner and describes BSAopt as forked from NIFopt. | Hive Games describes Chunker as an internal tool that it offers free to Minecraft partners and the general public under an exclusive licensing deal with Microsoft. |
| Purpose | BSAopt manages and recompresses BSA files, treating them like directories so files inside can be addressed easily. | Chunker converts Minecraft worlds between Java Edition and Bedrock Edition. |
Plans
In their own words
BSAOpt
BSAOpt is free, open-source Windows software for managing and recompressing BSA archives. It presents archive contents like directories, allowing files inside to be addressed directly, and can deduplicate files. Copy, Pack, Unpack, and Convert operations depend on the selected input and output. The listing says compression is roughly 5% better for files and 20% better for WAV files. Supported formats are BSA and ZIP, with archive extraction and mod packaging included. Version history lists Morrowind support, Fallout compatibility, and Xbox-type archives. Version 1.6.3 added recognition for XWM, FUZ, OGG, GID, and PEX files. Optional logs and a broken-header dialog can attempt recovery from corrupt BSAs. It is partially multi-threaded, supports 32-bit and 64-bit Windows Vista or later, and requires administrator execution when UAC is enabled. The listed version is 1.6.3, updated 14 January 2013.
Chunker
Chunker converts Minecraft worlds between Java Edition and Bedrock Edition, processing worlds locally on the user's machine. It can transfer 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 upgrade or downgrade worlds between supported game versions. Inputs include world folders, ZIP archives, and MCWORLD files, with drag-and-drop support. Users can adjust conversion and export settings and save settings for later conversions. The command-line interface supports conversion and workflow integration, but requires Java 17 or higher. Entities and player inventories are not converted; structure data such as villages and strongholds is listed as unsupported or limited. Chunker is free at free and open source under the MIT license. It is available for Windows, macOS, Linux, and through a web interface. Supported versions vary by edition: the listed ranges are Bedrock 1.12.0–1.26.50 and Java 1.8.8–1.21.11 and 26.1–26.3. Check compatibility before converting a world.