How do I find what is in list A but not in list B?

Paste A and B, run Compare lists, then open A only. That tab is every value in A that does not appear in B.

What if I need items that are in B but missing from A?

Open B only instead. Or swap which list you put in A if you prefer to always read A only.

Find what’s missing from the second list

Last updated: 2026-09-03

Paste the full list into A and the second list into B. After you compare, A only shows every item that is on your full list but not on the second one— the gaps you usually need to chase down.

How to set A and B

List A — the complete or expected list.
List B — the checklist, export, or what you actually have.
A only — items missing from B.
B only — extras that only appear on the second side.

Example

A (expected): task-1 … task-4
B (done): task-2, task-3, task-4
A only: task-1 — still missing.

Paste both lists to find gaps

Loading compare tool…

FAQ

How do I find what is in A but not in B?

Compare, then open A only.

Counts look wrong?

Check spaces and letter case first—see why two lists don’t match.