Tutorials/Command NBT tags

This page will be updated as soon as the formatting is complete and more progress has been made into the NBT Tags that can be attached to commands in 13w36a. For now see this Minecraft Forum Topic regarding the NBT Tags that can be added to the commands /give and /summon: [1]

As of snapshot 13w36a, NBT tags can be specified for items and entities created with the /give and /summon commands. Each tag has the format <tagname>:<value> ; multiple tags are separated by commas.(Ex: {ench:[],display:{}} ) The contents of List tags are enclosed in square brackets [], while the contents of Compound tags are enclosed in curly braces {} – note that the entire data tag is itself a Compound tag.(All within a set of {}) Tag names are case-sensitive, and white space is ignored.

See Entity Format for the various NBT Tags that are saved for each Entity. This page also contains basic information for each NBT Tag.

When None is used in a Tagname that means that this tag can be put directly into the start of the dataTag

Items

These can be used in /give and /replaceitem commands as well as /clear. For such commands as /summon and /setblock, place them inside of a tag tag, like so: {id:"stone",Count:3 ... tag:{Name:"your name" ...}} These tags can be used on any item

NBT Tag	Description	Allowed tagnames	Required tagnames	Syntax
Item	The name of the item as it will be visible on the ground and in the inventory, how many and tag data / damage value. The item cannot be picked up if it has no Count tag.	id, Damage, Count, tag	id	{Item:{id:#,Damage:#,Count:#,tag:{Item NBT data here}}}
ench	Allows the addition of enchantments to items. Contains information on the id of the echantment and the level of the enchantment. Can specify one enchantment or multiple enchantments.	id, lvl	All	{ench:[{id:#,lvl:#},{id:#,lvl:#}]}
display	Used to add custom names, colors (leather armor), and lore to items. Lore may have multiple lines. Color is a hexadecimal color value, except in decimal. Converters can be found here: RGB to hexadecimal: http://www.yellowpipe.com/yis/tools/hex-to-rgb/color-converter.php Hexadecimal to decimal: http://www.statman.info/conversions/hexadecimal.html	Name, color, Lore	At least one	{display:{Name:"name here",color:,Lore:["lore here", "lore here"]}}
AttributeModifiers	Can be used to add attributes to mobs or items.	AttributeName, Name (Attribute), Amount, Operation, UUIDLeast, UUIDMost	All	AttributeModifiers:[0:{AttributeName,Name,Amount,Operation}, 1:{AttributeName,Name,Amount,Operation,UUIDLeast,UUIDMost}]
Unbreakable	Used to make items with durability never degrade.	Unbreakable	All	{Unbreakable:1/0} (1 = true, 0 = false)
SkullOwner	Used for getting player heads.	SkullOwner	All	{SkullOwner:"player name"}
HideFlags (Minecraft 1.8)	Used to hide flags (the info in the tool tip) such as enchantments, CanDestroy, CanPlaceOn, etc. To hide multiple tags, you need to add the value of the tags you want to hide. For example, if you want to hide the "Enchantments" and the "Attributes modifiers" tags, the value you need to put is 3 (1+2).	HideFlags	All	{HideFlags:1-32} (1 = Enchantments, 2 = Attributes modifiers, 4 = Unbreakable, 8 = CanDestroy, 16 = CanPlaceOn, 32 = Others, such as potion effects)
CanDestroy (Minecraft 1.8)	Similar to CanPlaceOn this tag is used when making adventure maps to allow a specific tool/item to break a block. Apply the tag to any item/tool.	An array of Strings, each one saying the id of a block	at least one	{CanDestroy:["minecraft:stone","minecraft:stonebrick"]}
PickupDelay (Minecraft 1.8)	The number of ticks before an item entity can be picked up.	Any number. Set to 32767 for items that can't be picked up	All	{PickupDelay:#}
Age (Minecraft 1.8)	The length before an item will disappear.	Any number. Set to -32768 for items that don't disappear. Default (5 minutes) is 6000.	All	{Age:#}
generation (Minecraft 1.8)	Defines whether a written book is an "Original" a "Copy of Original" or a "Copy of a copy"	"Original", "Copy of Original", "Copy of a copy"	At least one	{generation:""}

The following table provides more details on previous sub-tags.

Tagname	Description	Used In	Value Type	Allowed Values
id	Refers to the id of an enchantment. See Enchanting for details on which id correlates to which enchantment.	ench	Numerical	0 - 62
lvl	Determines the level of an enchantment. A level between one and ten will display properly on an item, however, any value above that will display enchantment.level.lvl.	ench	Numerical	0 - 32767
Name	Is the name of an item that will be displayed in game. For blocks such as Chests and Dispensers the name will replace the default 'Chest' or 'Dispenser' in the upper left hand corner of the GUI. When used on command blocks the name will be displayed when executing commands. This can be seen by using the /say command.	display	String	Any character that is available within the Minecraft language files (Most characters on your keyboard)
Lore	The text under the name of the item. NBT editors have to be used to make the lore a color other than purple.	display	String	Any character that is available within the Minecraft language files (Most characters on your keyboard)

Blocks

These tags are put on blocks as items.

Tagname	Description	Value Type	Syntax
CanPlaceOn	This tag is used when making adventure maps to determine which block(s) the player can place a block on	An array of Strings, each one saying the id of a block	{CanPlaceOn:["minecraft:stone","minecraft:stonebrick"]}
BlockEntityTag	This is used for tile entities, and stores their data for when they are placed down	Differs based on the block, see Blocks for details	BlockEntityTag:{TagName:"tagdata"}

Entities

These tags are used when using the /summon command to spawn entities or whe using the /entitydata to edit the data of entities.

NBT Tag	Description	Allowed tagnames	Required tagnames	Syntax
TileEntityData	Used to store all data kept within a block. Mainly used within blocks that can store items or contain various data values, e.g., Command blocks, Chests, Jukeboxes, Dispenser, Beacon, etc.	CustomName, Items, Command, Levels, Primary, Secondary, Delay, MaxNearbyEntities, MaxSpawnDelay, MinSpawnDelay, RequiredPlayerRange, SpawnCount, SpawnRange, EntityID	None	TileEntityData:{}
direction	Similar to motion, determines the direction that some entities (Fireballs, Small Fireballs, and Wither Skulls) will be moving upon being summoned. Must be entered as double precision floating point values (it has a decimal) Example: {direction:[0.0,1.0,0.0]} summons with an upwards velocity of 1.0. This tag only determines the force and direction of which the entity is moving, not the direction the entity is facing.	X, Y, Z	All	direction:[X,Y,Z]
Motion	Similar to direction, determines the direction that most entities (All other than Fireballs, Small Fireballs and Wither Skulls} will be moving upon being summoned. Must be entered as double precision floating point values (it has a decimal) Example: {Motion:[0.0,1.0,0.0]} summons with an upwards velocity of 1.0.	X, Y, Z	All	Motion:[X,Y,Z]
ActiveEffects	Sets the effects that will apply to a mob after it is summoned.	Id, Duration, Amplifier, Ambient	All	ActiveEffects:[{Id:,Duration:,Amplifier:,Ambient:},{Id:,Duration:,Amplifier:,Ambient:}]
rewardExp	Controls villagers giving xp for trading, set to true or false		True/False	{rewardExp:true/false}
Riding	Shows the information of the Entity that is stacked below another Entity.	id, Riding, CustomName, ActiveEffects	id	Riding:{id:}
Equipment	Adds armor & weapons to Skeletons or Zombies. This tag is a JavaScript Array, with the consecutive values being: Held Item, Boots, Pants, Chestplate, Helmet. Any slot can be blank to indicate no item. The helmet can contain a block, which will display on the entities head.	Item	Item	Equipment:[{id:"",Count:,tag:{}...},{id:,Count:...},{id:...},{id:},{id:}]
DropChances	Determines how likely it is for an entity to drop held or worn Items. The tag Count in the equipment tag must be 1 or greater for this to work.	5 separate float values(1 for each slot). 0.0f-1.0f determines likelihood of dropping, but will apply a random durability if it does. Anything greater than 1.0f will make it always drop with full durability.	Since it is a float value, it must be phrased as "X.Yf", with X and Y being values of your choice.	{DropChances:[0.1f,2.0f,1.0f,1.1f,0.0f]
NoAI	Makes mobs have no AI.			{NoAI:0} or {NoAI:1}
Fire	Determines how many ticks a mob is on fire.			{Fire:1} to {Fire:32767}
Attributes	Customizes the attributes of the entity. See Attribute for more details	Name: see Attribute for a list. Base: the amount to apply. Modifiers: how much and how it should vary. Contains values Name, Amount, Operation, UUIDMost, UUIDLeast.	Name and Base	{Attributes:[{Name:"generic.maxHealth",Base:40,Modifiers:[{Name:generic.maxHealth, Amount:7,Operation:0,UUIDMost:4000,UUIDLeast:8000}]

The following table provides information on each tagname that can be added in an NBT Tag. These tagnames are specific to the /summon command.

Tagname	Description	Used In	Value Type	Allowed Values
Type	Used to change the type of mobs, like horses. Setting a horse's type to 4 will make it a skeleton horse.	None	Summon	1 - Infinity
Saddle	Used to spawn horses or pigs that have saddles on.	None	Summon	true / false or 1 / 0
Tame	Used to spawn tamed horses.	None	Summon	true / false or 1 / 0
Variant	Changes the horse variant. Setting no variant or putting an incorrect variant spawns a normal white horse. See Horse Variants for the list of Variants.	None	Summon	1 - 1030
Size	Changes the size of a slime summoned into the game. Anything higher than 255 summons size 255. Anything lower than 0 summons size 0. More than 32 tends to cause extreme lag.	None	Slime Size	0 - 255
Block	Determines which block is being summoned when using /summon FallingSand. Use Data Values to find out the ID of each block. You can also use F3+H in-game to show the ID's of items in-game.	None	Block ID {Block:"minecraft:redstone_block"}	1 - 173
Time	Whether or not the block despawns before hitting the ground. If set to 1 the block will fall normally, if set to less than 1 will be set to 0. If set to 0 the block will despawn immediately. Recommended to keep this value as 1. -1 will never despawn.	None	Numerical	-1 - 127
DropItem	Whether or not the block will drop its item form if the block is unable to be placed. If set to 0 the block will not drop its respective item, if set to 1 the block will drop its respective item.	None	Numerical	0 or 1
id	Determines the entity the other entity will be riding on.	None	Savegame ID	Any Savegame ID of an Entity
Fuse	Determines how long it takes for PrimedTnt or a Creeper to explode.	None	Numerical	0 - 383
ExplosionPower	Used when summoning fireballs to set the power of the explosion	None	Numerical	0-127

Fireworks

These tags are used when summoning fireworks.

NBT Tag	Description	Used in	Value type	Syntax
LifeTime	Determines how long the firework will last before exploding.	N/A	Numerical (in ticks)	{LifeTime:#}
FireworksItem		N/A	NBT tags	{FireworksItem:{NBT tags}}
id		FireworksItem tag	Numerical	{FireworksItem:{id:#}}

Blocks

Tags used in /setblock and /fill

Tagname	Description	Value Type	Syntax
Command	Used with command blocks. Places command block with command.	A string	{Command:"desired command"}

Generic

These tags can be used on most tile entitied blocks

Tagname	Description	Value Type	Syntax
CustomName	Displayed in the top corner of the inventory, instead of the regular name. Only works where such a regular name exists.	A string.	{CustomName:"Custom Name"}
Lock	Says a name needed on a held item to open the inventory.	A string	{Lock:"Key's Name"}

Beacon

Tagname	Description	Value Type	Syntax
Primary	This determines the first status effect that the beacon will create. It defaults to level 1 of the effect.	An ID of a status effect.	{Primary:num}
Secondary	This determines the second status effect. If its the same as Primary, then it will increase the status effect to level 2. Otherwise it will be level 1.	Also an ID of a status effect.	{Secondary:num}

Spawner

These tags are used when using /setblock or /summon (spawner minecarts) to create spawners.

Tagname	Description	Value Type	Syntax
EntityId	Specifies what entity the spawner spawns.	A string	{EntityId:"EntityName"}
SpawnData	Used for spawners that spawn entities with data tags.	An entity NBT tag	{SpawnData:{NBT tag}}
SpawnCount	How many entities the spawner will spawn at one time.	A number	{SpawnCount:#}
SpawnRange	The range of which the entities can spawn.	A number	{SpawnRange:#}
RequiredPlayerRange	The range of which a player must be in for the spawner to start spawning entities.	A number	{RequiredPlayerRange:#}
Delay	The number of ticks before entities spawn when a player is first detected.	A number	{Delay:#}
MinSpawnDelay	After the first spawn, this is the minimum amount of ticks before more entities can spawn.	A number	{MinSpawnDelay:#}
MaxSpawnDelay	Similar to MinSpawnDelay. After the first spawn, this is the maximum amount of ticks before more entities can spawn.	A number	{MaxSpawnDelay:#}
MaxNearbyEntities	Checks the number of entities within the spawn range ('SpawnRange' tag). If the number of entities it detects is over the set MaxNearbyEntities number, it will not spawn more entities unless the amount of entities within the spawn range is decreased.	A number	{MaxNearbyEntities:#}
SpawnPotentials	Used when creating spawners that spawn multiple types of entities.	A string	{SpawnPotentials:[{Type:"EntityName",Weight:#,Properties:{NBT tag}}]}
Weight	Used if spawning multiple entities using SpawnPotentials. If the same as the SpawnPotentials entity, they will both have an even chance of spawning.	A number	{Weight:#}

Sub-tags used in the SpawnPotentials data tag.

Tagname	Description	Value Type	Syntax
Type	Determines the other entity that spawns with the entity specified in the EntityId data tag. MUST be used with SpawnPotentials.	A string	{SpawnPotentials:[{Type:"EntityName"}]}
Weight	Determines the chance of spawning the entity specified in the 'Type' sub-tag. If set to the same as the other entity's weight, they will have the same chance of spawning.	A number	{SpawnPotentials:[{Weight:#}]}
Properties	Determines the entity data tag(s) that the entity (specified in the 'Type' sub-tag) will be spawned with.	An entity NBT tag	{SpawnPotentials:[{Properties:{NBT tag}}]}