Remove Duplicate Lines Online — Free List Dedupe

Dedupe any list in your browser: remove duplicate lines with ignore-case, consecutive-only and sort options. Free, no upload, no limits.

Stays on your deviceFree

Your text

Cleanup optionsCollapse extra spacesNormalize unicode spaces (NBSP…)Trim line edgesRemove blank linesRemove duplicate linesIgnore caseConsecutive onlySort linesStraighten smart quotesStrip HTML tags

Result

Paste any list — emails, URLs, keywords, log lines — and get it deduplicated in your browser. List-tool options: ignore case, remove only consecutive duplicates (classic uniq), and sort the result. By default nothing else is touched: no trimming, no space collapsing — your list items stay byte-identical.

FAQ

Which duplicate is kept?

The first occurrence, preserving the original order. Enable 'sort lines' if you want the result ordered.

Are 'Item' and 'item' duplicates?

Only if you enable ignore case. The kept line is always the first one as you pasted it.

Is there a size limit?

No fixed limit — everything runs locally; lists with tens of thousands of lines are fine.

How it works & more

FAQ

Which duplicate is kept?

The first occurrence, preserving the original order. Enable 'sort lines' if you want the result ordered.

Are 'Item' and 'item' duplicates?

Only if you enable ignore case. The kept line is always the first one as you pasted it.

Is there a size limit?

No fixed limit — everything runs locally; lists with tens of thousands of lines are fine.

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