List Comparer
Compare two lists to find common, unique and combined items.
Only in A · 0
—
Only in B · 0
—
In both · 0
—
Combined · 0
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Formula & methodology
Each list is split into lines, trimmed and de-duplicated, then compared as sets: only-A, only-B, intersection (common) and union (combined).
Worked example
- A: apple, banana, cherry — B: banana, cherry, date → Only A: apple · Only B: date · Common: banana, cherry
Frequently asked questions
Are duplicate lines counted?
No. Each list is de-duplicated first, so repeated lines are treated as a single item.
Is the comparison case-sensitive?
By default yes, but you can turn on case-insensitive matching so Apple and apple are treated as equal.
Privacy
All processing happens locally in your browser. Your data is never uploaded.