Bedrock NBT Editor vs Chunker

Bedrock NBT Editor is a free browser-based tool for editing Minecraft Bedrock Edition and Java Edition NBT files. It accepts files such as level.dat, playerdata, .nbt, .mcstructure, .schem, and .schematic, and detects byte order, headers, and compression across five NBT encodings. Users can search tags, add or remove them, change values, and download the edited file. The editor can also export the tree as SNBT text and convert between Bedrock files and Java big-endian gzip format. For large files, typed arrays and lazy rendering display 200 entries at a time; BigInt preserves 64-bit TAG_Long values such as world seeds and UUID halves. Files are parsed locally, with no upload endpoint, and the editor continues to work offline after the page loads. Android users can choose a world file from a file manager; iOS users must first put it in the Files app. The project is open source under the MIT license. The maker says it is not affiliated with Mojang Studios or Microsoft.

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.