Updated:
1. Hide enchantments (1.21.5+)
/give @s minecraft:diamond_sword[enchantments={sharpness:5},tooltip_display={hidden_components:["enchantments"]}]
List the components to hide in hidden_components. The enchantments still work; they just no longer show.
2. Hide several lines
/give @s minecraft:diamond_sword[enchantments={sharpness:5},unbreakable={},tooltip_display={hidden_components:["enchantments","unbreakable","attribute_modifiers"]}]
Other useful names: can_break, can_place_on and dyed_color. attribute_modifiers also hides the default attack damage and speed lines.
3. Hide the whole tooltip
/give @s minecraft:diamond[tooltip_display={hide_tooltip:true}]
Nothing shows on hover, not even the name. Good for mystery items.
4. Remove or add the glint
/give @s minecraft:diamond_sword[enchantments={sharpness:5},enchantment_glint_override=false]
/give @s minecraft:stick[enchantment_glint_override=true]
Works on 1.20.5 and later.
5. 1.20.5 to 1.21.4
/give @s minecraft:diamond_sword[enchantments={levels:{sharpness:5},show_in_tooltip:false},unbreakable={show_in_tooltip:false}]
/give @s minecraft:diamond[hide_tooltip={}]
Each component took show_in_tooltip:false; other details were hidden with hide_additional_tooltip={}.
6. 1.20.4 and older
/give @s minecraft:diamond_sword{Enchantments:[{id:"minecraft:sharpness",lvl:5s}],HideFlags:1}
Add up the flags: 1 enchantments, 2 attributes, 4 Unbreakable, 8 CanDestroy, 16 CanPlaceOn. See NBT vs components.
Troubleshooting
- Still visible: match the syntax to your version; it changed in 1.21.5.
- Enchantment stopped working: hiding never removes the effect, so check the enchantment syntax.
- Bedrock: tooltips cannot be changed with give.
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