Simple item editor is a minecraft mod for item editing using client commands.
/edit
command:... attribute ...
... get [<id>]
... set <id> <attribute> <amount> [<operation>] [<slot>]
... remove <id>
... clear
... banner ...
... get [<index>]
... set <index> <pattern> <color>
... remove <index>
... add <pattern> <color>
... insert <index> <pattern> <color>
... base ...
... get
... set <color>
... remove
... clear
... clear before <index>
... clear after <index>
... color ...
... get
... set <color>
... remove
... component ...
... get <component>
... set <component> <value>
... remove <component>
... count ...
... get
... set [<count>]
... add [<count>]
... take [<count>]
... max ...
... get
... set <count>
... reset
... stack
... data <source> ...
... get [<path>]
... append <path> <value>
... insert <path> <index> <value>
... prepend <path> <value>
... set <path> <value>
... merge <value> [<path>]
... remove <path>
... clear
... durability ...
... get
... set <durability>
... progress <progress>
... reset
... max ...
... get
... set <durability>
... remove
... reset
... unbreakable ...
... get
... set <unbreakable>
... enchantment ...
... get [<enchantment>]
... set <enchantment> [<level>]
... remove <enchantment>
... glint ...
... get
... set <glint>
... reset
... clear
... equip [<slot>]
... get [<item>] [<count>]
... head ...
... get
... set ...
... owner <owner>
... texture <texture>
... remove
... lore ...
... get [<index>]
... set <index> [<line>]
... remove <index>
... add [<line>]
... insert <index> [<line>]
... clear
... clear before <index>
... clear after <index>
... material ...
... get
... set <material>
... model ...
... get
... set <model>
... reset
... name ...
... get
... set [<name>]
... reset
... custom ...
... get
... set [<name>]
... reset
... potion ...
... get [<effect>]
... set <effect> <duration> [<amplifier>] [<particles>] [<icon>] [<ambient>]
... remove <effect>
... clear
... type ...
... get
... set <type>
... reset
... color ...
... get
... set <color>
... remove
... rarity ...
... get
... set <rarity>
... tooltip ...
... get <part>
... set <part> <tooltip>
... trim ...
... get
... set <pattern> <material>
... remove