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ListDiff

Compare three lists online

Paste three sources—channels, classes, or exports. See what’s unique to each, shared by exactly two, or present in all three. The compare stays in your browser.

Free Local processing No signup Three lists

Tool

List A
0
List B
0
List C
0
Updates as you type

Paste three lists—the Venn-style regions update automatically.

Only two lists? Use the list compare tool. Need one unique list from two sources? Use merge lists.
Two lists Merge lists Find duplicates Which tool? Docs

How it works

  1. Paste or upload three lists—or try Example.
  2. Leave Ignore case on unless keys are case-sensitive.
  3. Open Only A / B / C, pairwise tabs, or All three.
  4. Copy the active region when you need it in a sheet.

Good for

  • Three email or audience lists from different channels.
  • Three class or team rosters for shared vs exclusive names.
  • Three catalog or tag exports before a merge.
  • Private pastes—no account for the compare step.

Quick answers

A∩B tab? In A and B, but not C. All-three items live under All three.

Only two lists? Use list compare —simpler tabs.

Want one unique file? Merge pairwise with merge lists, or start from All three + uniques.

Only A / B / C

Exclusive to one source—the usual “not on the other two” set.

Pairwise

Shared by exactly two lists—useful for channel overlap without the third.

All three

Present in every list—confirmed across all sources.

FAQ

How do I compare three lists online?

Paste A, B, and C above, then open the region tabs. Nothing is uploaded for the compare step.

What does A∩B mean here?

In A and B only—not in C. Use All three for the full intersection.

Should I use two-list compare instead?

Yes if you only have two sources. See which tool if you are unsure.