ItemPreview

Use ItemPreview to see a list of all items/IDs in the game, searchable and filterable by type and quality

The new advanced search options in v1.15

Preview of a plussed version of an existing item using /plus +5 t5 [Earrings (Gift from Pioneer Village)]

Note: [Earrings (Gift from Pioneer Village)] was linked from inventory. All stats on it are kept except the + is replaced by +6 and it's ...

Clicking items in the list will add them to the preview window. Also note that you can use wildcards (regex) to search

Preview of Flame lvl 52 using /skill 491150 52

Can view a dummy of the opposite sec and add items to it for preview.
Can add data about the item in the tooltip, like update time, id, which zones you've looted the item in and from whic mobs.

Preview of a tiered and plussed item using /plus t4 211549

Note: t4 specifies to tier the item 4 tiers above its default (in this case, t3 + t4 = t7)