Amulet-Map-Editor VS dragonfly

Edit: AmuletEditor: https://www.amuletmc.com/ Plugin to edit NBT: https://github.com/PREMIEREHELL/Amulet-Plugins/blob/main/EntitiePlugin_nbt_edit.py

There were a few projects that continued working on it. One of them, “MCEdit: Unified”, was supported until 2019, but I don’t believe it supported the MC 1.13 Block ID formats. The team remade it for newer versions and named it Amulet for MC 1.12+.

You can use Amulet to delete chunks that you don't want, and it seems to work with both Java and Bedrock worlds.

Try exporting your map then using Chunker to convert to .mcworld. If your world size is too big for it, try Amulet Editor. instead.

Use a map editor like Amulet to delete unused chunks of the map.

I’m not too experienced with it, but you can try to use amulet to try and edit the nether chunks

https://www.amuletmc.com It's pretty easy to use and it does offer the option to change biomes for selected chunks, as well as trim worlds etc.

If you have that, you can use Amulet to copy the chunks to a new world. Amulet also offers a feature that might be a better option for you. It will let you select chunks to save, then delete all others. This lets them regenerate with the new features included.

MCEdit is not compatible with worlds newer than 1.12.2. Some of the developers moved on to Amulet, though I'm not sure how feature complete it is.

- What server software or framework to use. Ideally, if you dont need too much vanilla features (world generation, all mobs & items implemented, etc), I'd use something lightweight that is not based off of the vanilla server software. There are a few projects like this on github, including: https://github.com/Minestom/Minestom , https://github.com/feather-rs/feather , https://github.com/KryptonMC/Krypton , https://github.com/df-mc/dragonfly (bedrock). Which one you use will probably depend mostly on your preference. - You will need a way to store data separate from the servers. A database like postgres should work. There are a lot of different databases tho!

For the past months (on and off) I have been working on a project that I call Jukebox. It is an extension of the Minecraft server software known as Dragonfly (written in Go) that supports plugins/mods written in Go.

There is Minetest, which has at least one configuration that attempts to mimic vanilla Minecraft, but I'm not certain how accurate it is.

The stored data structures are well understood for both versions. See for example https://www.amuletmc.com/ (Editor, Python) or https://github.com/df-mc/dragonfly/tree/master/server/world/... (Code, Go)

You can try it. You'll need Termux (a linux terminal emulator running inside android). Then you have to install go (pkg install golang) and git (pkg install git) and dragonfly (https://github.com/df-mc/dragonfly) (a faster third party server software) and it should work, although this is a theoretical solution. Termux continues running in the background and you might even be able to put the phone to sleep whilst keeping the server running.