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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— no items —

💡 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.

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

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

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Processed locally.

Como funciona

Entra

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

Proceso

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.

Por que usar o noso?

✓Completamente gratuíto, sen custos ocultos, nunca

✓Non se precisa ningunha conta, correo electrónico ou inicio de sesión

✓Os ficheiros nunca saen do teu dispositivo

✓Non hai límites de tamaño de ficheiro

✓Non hai marcas de auga en ningunha saída

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