Minecraft NBT Viewer
Open any Minecraft NBT file — level.dat, playerdata, schematics — as a browsable tree. Gzip is unwrapped automatically, and both Java and Bedrock byte orders are supported.
Intended for your own single-player save files. Editing saves in multiplayer or online games breaks their terms of service and can get your account banned. Always keep a backup of the original file before you change anything.
Reads Minecraft NBT from Java Edition (big-endian) and Bedrock (little-endian), decompressing gzip automatically since level.dat is almost always compressed. 64-bit Long values are shown as strings because JavaScript numbers cannot hold them exactly. This is a viewer — it does not write NBT back, so use it to understand a save rather than to edit one.
How to use
- 1Drop level.dat, a playerdata file or any .nbt file.
- 2Browse the tag tree, or switch to the JSON view.
- 3Copy or download the whole structure as JSON.
Frequently Asked Questions
What is NBT?
Named Binary Tag, the format Minecraft uses for nearly all its structured data — world settings, player inventories, entities and schematics. It is a tree of typed, named tags, similar in spirit to JSON but binary and compact.
Where do I find these files?
level.dat sits in the root of each world folder, on Windows under %appdata%\.minecraft\saves\[world]. Player data lives in playerdata/[uuid].dat inside the same folder. Always copy a file out before opening it, and never edit a world that is currently loaded.
Does it work with Bedrock Edition?
Yes. Bedrock writes little-endian NBT and its level.dat has an 8-byte header before the root tag; both are detected automatically. Bedrock world data itself lives in a LevelDB database, which this tool does not read.
Why are some numbers shown as text?
64-bit Long values exceed what a JavaScript number can hold exactly, so they are rendered as strings to avoid silently corrupting them. World seeds are the usual case.
Can I edit and save the file?
Not with this tool — it reads NBT but does not write it. For editing, NBTExplorer is the long-standing desktop option. Use this to inspect a file quickly without installing anything.