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