Level Format

Byte Order

level.dat is stored in Little Endian byte order.

Parsing level.dat

Tag Name	Tag Type	Description
GameType	IntTag	Whether in survival (0) or in creative (1) mode.
LastPlayed	LongTag	Stores the Unix time stamp (in seconds) when the player saved the game.
LevelName	StringTag	Specifies the name of the level.
Platform	IntTag	Seems to store the platform that the level is created on. Currently observed value is 2.
Player	CompoundTag	Player entity information. See Entity Format for details. It is missing the id tag and has additional elements.
RandomSeed	LongTag	Random number providing the Random Seed for the terrain.
SizeOnDisk	LongTag	Estimated size of the entire world in bytes.
SpawnX	IntTag	X coordinate of the world’s spawn position. Default is 0.
SpawnY	IntTag	Y coordinate of the world’s spawn position. Default is 64.
SpawnZ	IntTag	Z coordinate of the world’s spawn position. Default is 0.
StorageVersion	IntTag	Version of Bedrock Edition NBT, is 3.
Time	LongTag	Stores the current “time of day” in ticks. There are 20 ticks per real-life second, and 19200 ticks per Minecraft daylight cycle, making the full cycle length 16 minutes—4 minutes shorter than the standard 20 minute daylight cycle.
dayCycleStopTime	LongTag	Determines the tick the daylight cycle is paused at. Values at or above 2,147,483,648 (231) result in the daylight cycle not being paused. Default value is 5,000 in creative mode, and 18,446,744,073,709,551,615 (264-1) in survival mode.
spawnMobs	IntTag	Disable (0) or enable (1) mob spawning.

Player Data

Tag Name	Tag Type	Description
Armor	ListTag of CompoundTags	Each CompoundTag in this list defines a piece of armor that the player is wearing. This is a list with length 4 - for helmet, chestplate, leggings, and boots.
Dimension	IntTag	The dimension the player is in. 0 is the Overworld.
Inventory	ListTag of CompoundTags	Each TAG_Compound in this list defines an item the player is carrying or holding.
Score	IntTag	The score of the player.
Sleeping	ByteTag	1 or 0 (true/false) - true if the player was in a bed when this tag was saved; has no effect on whether the player is in a bed when they log in.
SleepTimer	ShortTag	The number of ticks the player had been in bed when this tag was saved. No effect.
SpawnX	IntTag	X coordinate of the player’s spawn position. Default is 0.
SpawnY	IntTag	Y coordinate of the player’s spawn position. Default is 64.
SpawnZ	IntTag	Z coordinate of the player’s spawn position. Default is 0.
abilities	CompoundTag	The abilities this player has.

Armor Data

Tag Name	Tag Type	Description
id	ShortTag	Item or Block ID.
Damage	ShortTag	For armor, the amount of wear they have suffered. The maximum durability of the armor means undamaged. When the Damage reaches 0, it breaks and disappears.
Count	ByteTag	Number of items stacked in this inventory slot. Any item can be stacked, including tools. Range is 1-255. Values above 255 are not displayed in-game.

Inventory Data

Tag Name	Tag Type	Description
id	ShortTag	Item or Block ID.
Damage	ShortTag	For armor, the amount of wear they have suffered. The maximum durability of the armor means undamaged. When the Damage reaches 0, it breaks and disappears.
Count	ByteTag	Number of items stacked in this inventory slot. Any item can be stacked, including tools. Range is 1-255. Values above 255 are not displayed in-game.
Slot	ByteTag	Indicates which inventory slot this item is in.

Abilities Data

Tag Name	Tag Type	Description
mayfly	ByteTag	1 or 0 (true/false) - true if the player can fly.
flying	ByteTag	1 or 0 (true/false) - true if the player is currently flying.
invulnerable	ByteTag	1 or 0 (true/false) - true if the player is immune to all damage and harmful effects except for void damage.
mayBuild	ByteTag	1 or 0 (true/false) - true if the player can place and destroy blocks.
instabuild	ByteTag	1 or 0 (true/false) - true if the player can instantly destroy blocks.