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[jaquadro]

NBTExplorer is a low-level graphical NBT data editor similar to, inspired by, and based on  NBTedit.  The key difference is NBTExplorer's full support for Minecraft .mcr region files, and a directory-tree interface for easily exploring multiple worlds.  NBTExplorer is built on top of Substrate.

NBTExplorer can read:

• Standard NBT files (e.g. level.dat)
  
• Schematic files
  
• Uncompressed NBT files (e.g. idcounts.dat)
  
• Minecraft region files (*.mcr)
  
• Minecraft anvil files (*.mca)
  
• Cubic Chunks region files

Windows Users
NBTExplorer is a Windows .NET application, and requires .NET framework 2.0 or higher to run.

Linux Users
NBTExplorer has been tested for compatibility with recent Mono runtimes.  Minimally, your system needs the mono-core and mono-winforms packages, or whatever set of packages is equivalent.



Mac Users
There is now a Mac-specific version of NBTExplorer available with a native UX.  It has only been tested on 10.8 Mountain Lion.  The earliest it will probably run on is 10.6 10.7 Lion, but no promises. (Confirmed to not work on 10.6 -- any Mono stack developers in a Mac environment are welcome to help investigate why).

This program still runs on top of Mono with a MonoMac bridge, but the application comes with all of its dependencies built into the app package.  This version is still considered experimental and it may crash unexpectedly or be missing some functionality.  Report problems as you encounter them and I'll see what can be resolved.

Remember, you can still run the Windows version of NBTExplorer on your Mac by following the Linux instructions and installing the Mono runtime.

Project Page: Github
Download: Windows / Linux
Download: Mac

(The older 1.x release can still be downloaded here)

I recommend backing up worlds before modifying them with this tool.

Frequently Asked Questions

Q: NBTExplorer didn't save my changes -- why?

A: It's possible you forgot to save.  The more likely answer is NBTExplorer did save your changes, and if you were to immediately re-open your world in NBTExplorer, you would see that your changes are still there.  Instead, Minecraft erased or ignored your changes when you loaded your world.  The most common trap is editing player settings or inventory on a single-player world and making your changes in a <player>.dat file instead of in level.dat.  Minecraft will overwrite your <player>.dat file on load with the contents of the player tag in level.dat.

Q: The Mac version doesn't run on my Mac!

A: If you're running OSX 10.6.x or earlier, the Mac version is confirmed to not work.  There has been no confirmation either way for 10.7.x.  It has been tested and confirmed to work for several people on 10.8.x, although that may still not be a guarantee that it will work for you, or that it will be bug-free.

If you're having problems running the Mac-specific version of NBTExplorer, there is still a high probability that you can run the Windows/Linux version instead.  thhinds has posted a more detailed set of instructions here.  It won't be as pretty -- you'll get a very crude looking version of Windows UI styling instead of native OSX styling, but it should still do the job.  I can't do anything about this unless an experienced Cocoa developer that also has some .NET/Mono experience is willing to step up and help me determine why it won't run on older versions of OSX.

[Davve]

Meh, wasn't planning on finishing mine anyway.

[Razeredge]

Looks good!

[miauw62]

Only two posts?
I think people are getting too stond of their comfort and user-friendlyness.
Gratz to you for making this!

[Peacem4k3r]

Really nice, using this all time :3

Thanks for this program

~Peacem4k3r

[smenx]

Thanks a lot for making this!

Our biomes in QuestWorld where changed through MC 1.1, this program helped me fix it

[jaquadro]

NBTExplorer has been updated.  Rough changeset:

- Project retargeted to .NET Framework 2.0
- General usability improvements
- - Open folder dialog remembers your last position
- - Files and folders can be dragged into the window to open them
- - Files and folders can be dragged onto the executable to open them at launch
- Improved Mono support, tested to run under both Linux and MacOS X (as always, YMMV)

[Darq]

Nice job with this. <3

[Mr.OMG]

umm....Can I change weather with this?like disable it or remove all snow?or an option to make raining like 1 second so it doesnt matter

[jaquadro]

No, that requires a mod.  If you're looking to physically remove all snow blocks, a block replacement tool can do that for you.  There's several around.

[wblabla4]

I still don't understand why this thread haven't got crapton of replies. Nice tool, i use it all the time!

[jaquadro]

NBTedit is still a good tool for most people, and even that's pretty low level for the average player.  Chunk editing is a niche requirement and most useful to developers.  That's okay.

[FentonAlpha]

Can anyone tell me (if even possible) what i would need to edit in my level.dat with this program in order to make this appear as a fresh start world even though structures and features have spawned in it?  

The purpose is to use an existing World with the "Tale of Kingdoms" mod.  I have moved my spawn point to where i want the Mods building to spawn, but the mod will only spawn them on new worlds.  So to sum up... how can i make my old world new without deleting all the progress i made on it?  Is that even possible?

[mandog15]

Cool

I have a question, I have a diamond sword on a world in minecraft, I want to edit it to have enchantments, how?

[jaquadro]

FentonAlpha, on 14 February 2012 - 05:05 PM, said:

Can anyone tell me (if even possible) what i would need to edit in my level.dat with this program in order to make this appear as a fresh start world even though structures and features have spawned in it?  

The purpose is to use an existing World with the "Tale of Kingdoms" mod.  I have moved my spawn point to where i want the Mods building to spawn, but the mod will only spawn them on new worlds.  So to sum up... how can i make my old world new without deleting all the progress i made on it?  Is that even possible?

That largely depends on how the mod determines new-world state.  If it goes off of an attribute like TerrainGenerated (which is used by Minecraft to determine when to populate chunks with trees, ores, etc.), then you could reset that flag, although it may have negative effects on your chunks.  If it hooks into the routines that actually create chunks, then you'd need to delete the chunks where you'd like it to spawn.  If it somehow hooks into the code that first creates a world, then I'm not sure there's anything you could do.  

mandog15, on 14 February 2012 - 06:28 PM, said:

Cool

I have a question, I have a diamond sword on a world in minecraft, I want to edit it to have enchantments, how?

You can add the necessary tags to your items to give them enchantments.  Check http://www.minecraft...le_Format#Items for the exact tag hierarchy needed -- enchantments are rooted in the "ench" compound tag.  If you have enchantments on any of your items already, then you can look at those in NBTExplorer and use them as a guide.  If you look around the tools forum, there are also tools specifically to edit enchantments that are probably easier to use.

[FentonAlpha]

[quote name='jaquadro' timestamp='1329260065' post='12799358']
That largely depends on how the mod determines new-world state.  If it goes off of an attribute like TerrainGenerated (which is used by Minecraft to determine when to populate chunks with trees, ores, etc.), then you could reset that flag, although it may have negative effects on your chunks.  If it hooks into the routines that actually create chunks, then you'd need to delete the chunks where you'd like it to spawn.  If it somehow hooks into the code that first creates a world, then I'm not sure there's anything you could do.  

Thanks for the response.  Ultimately i think it's just time to start a new world and enjoy building it up anew.

[jaquadro]

NBTExplorer has been updated for Anvil map support.  The set of NBT tags was expanded in anvil to include int arrays, which are now used in the .mca region files.

[mandog15]

I use NBTedit aswell as NBTexplorer, NBTE (nbt explorer) has a nice interface and more options.
NBTED (NBT edit) is simple has good options and clean.

Use NBTED for your first time then use NBTE.

I am surprised this hasn't gone over 1 page.
Though I only ever use these fine tools to extend my health on my gold sword (I got all the XP and enchants legitly, fire aspect V looting V knockback IV and I cheated this last one sharpness 10)

So I do not want to lose it

[jddevos]

this looks awesome!

[jaquadro]

NBTExplorer has been updated, adding a (read-only) hex editor for viewing the contents of byte array and int array tags.  I'll extend this for read-write support later, but for now it was just critical I be able to read the data to verify the changes I'm making to Substrate.