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Duplicate Line Remover
Remove duplicate lines while preserving or sorting the remaining items.
About this duplicate line remover
Clean duplicate keywords, URLs, names, email lists, IDs, or copied rows with a fast browser-only line deduper.
Mavis Tools is built for quick utility work: paste the input, get the result, and move on. The page is static-first for speed, and the interactive work happens in your browser. That makes it useful for drafts, calculations, debugging snippets, and repeat everyday tasks.
This tool is intentionally focused. It does one job clearly instead of asking for an account or hiding the result behind a long workflow. Bookmark it if you need a fast duplicate line remover that works on desktop and mobile.
FAQ
Does it preserve order?
Yes. The first occurrence is kept in the original order.
Is matching case sensitive?
The first version treats exact lines as duplicates.
Is my list private?
Yes. The tool runs in your browser, and the input is not uploaded to a server.