Find the Overlap Between Two Lists

See which items appear in both lists (the intersection).

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List A (0 lines)

List B (0 lines)

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💡 Paste a list in each box (one item per line). Only in A = items missing from B · In both = the overlap · Only in B = items missing from A · All (unique) = combined, de-duplicated. Everything runs in your browser.

overlap tips

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The "In both" view is the intersection — items present in A and B.

📊

Great for finding common customers, shared tags, or mutual entries.

🔢

Each tab shows a count so you can quantify the overlap.

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Processed locally.

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Enter your data into the tool above. Everything stays local to your browser.

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The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

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Get your result instantly. Nothing is stored after you leave the page — complete privacy.

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✅

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