Open NBT files in your browser
Minecraft's own format for worlds, structures and players. Open one right here as a tree of its tags, with a world's or a structure's facts above it. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your file opens as a tree, its first levels unfolded on a page as wide as a book.
- Fold and unfold • Files of any size
- Search keys and values • Every match counted
- Tree, Table or Text • Show shape
- Export • Save in another form, or just a part
About NBT
Minecraft saves its data as NBT, Named Binary Tag: a world's level.dat, its players, the structures that structure blocks save, and the chunks of its region files. Markus Persson made it for the game's first versions.
NBT is a tree of named tags, each a byte, short, int, long, float, double, string, list, compound or array of bytes, ints or longs. Java Edition writes it big-endian, usually packed with gzip, and Bedrock little-endian, its level.dat behind an 8 byte header.
Filepeek reads every form into a tree with each value's type. A level.dat gets an Overview with the world's name, version, seed, game mode, difficulty, hardcore, last played and spawn, and a structure file its size and its palette of blocks.
Named Binary Tag
.nbt
Format
- MIME type
- application/octet-stream
- Made by
- Markus Persson, now Mojang Studios
Inside the file
- Tags
- 12 types, from Byte to Long Array
- Java
- Big-endian, usually gzip
- Bedrock
- Little-endian
- Files
- level.dat, players and structures
Opens in every browser
No browser opens an NBT file: they download it. Filepeek opens it as a tree in Chrome, Edge, Firefox and Safari.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Questions
How do I open an NBT file?
Drop it on this page or choose Peek an NBT. Gzipped or not, Java or Bedrock, it opens as a tree of its tags with each value's type.
Can I see a world's seed?
Yes. Drop its level.dat, and the Overview shows the world's name, seed, game mode, difficulty and when it was last played.
Is my file uploaded?
No. It opens inside your browser and never leaves your device.