Bedrock NBT Editor vs Project Lodestone

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.

Project Lodestone is a free, open-source toolset for editing and converting Minecraft worlds across Java, Bedrock, console, and other editions. It is still in development, with desktop and web user interfaces described for the project. Documentation lists Java, Bedrock, Raspberry Pi, Xbox 360, PlayStation 3 and 4, PlayStation Vita, Wii U, 3DS, Switch, and Classic Javascript Remake. Planned save editing covers player, region, chunk, and level data, while conversion aims to span editions and versions with options such as depth fixing and lighting recalculation. Listed formats include NBT, S-NBT, MCR/MCA, GRF, MCS, ARC, LOC, PCK, COL, FUI, CDB, and VDB. Other roadmap tools include biome, entity and block-entity, hex, LevelDB, datapack, and map-item editors. libLodestone provides file reading, writing, and conversion for many editions and versions, including Java, Legacy Console, New Nintendo 3DS, and classic.minecraft.net worlds. The app roadmap treats user-facing loading and exporting as planned work. Some converter versions are unavailable in the app, and many listed versions are expected rather than completed support. The project uses an LGPL-3.0 license and is not an official Microsoft, Minecraft, or Mojang Studios product.