List Intersection Difference
Find common and unique items in two lists.
Compare two lists
Paste two lists and this shows their intersection (in both), and each list's difference (only in one) — the set operations behind reconciling two exports or spotting what changed.
It is the fast reconciliation tool — which emails are on both lists, which are only in the new export, which dropped off — without writing a lookup formula.
Line by line
Each line is one item, compared as written. Your lists are compared on your device and never uploaded. Comparing last month's subscribers against this month's, for example, shows at a glance who joined, who left, and who stayed.
Frequently asked questions
What does this list intersection difference do?
Compare two lists and see overlaps plus one-sided differences.
How do I enter the two lists?
Paste the first list, a line containing only ---, then the second list, one item per line.
What are the three output sections?
Shared (items in both lists), Only first list, and Only second list, each keeping the original spelling from its list.
What does the case-insensitive option change?
With it on, "Apple" and "apple" count as the same item. Leading and trailing spaces are always ignored in the comparison.
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