Merge and De-duplicate Two Lists

Combine two lists into one unique list.

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List A (0 lines)

List B (0 lines)

Trim whitespaceIgnore case

— 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.

de-duplication tips

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The "All (unique)" view merges both lists and removes duplicates in one step.

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Use "Ignore case" to treat differently-cased duplicates as one.

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Copy the merged list straight into your spreadsheet or tool.

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Runs entirely in your browser.

Hoe het werkt

Invoer

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

Verwerken

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.

Waarom de onze?

✓Volledig gratis — geen verborgen kosten, ooit

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✓Bestanden verlaten nooit je apparaat

✓Absoluut geen bestandsgroottelimieten

✓Geen watermerken op uitvoer

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