Can I keep the last occurrence instead of the first?

Yes, toggle 'Keep last occurrence' to preserve the final instance of each duplicate.

Does it ignore whitespace differences?

Enable 'Trim lines' to treat lines with extra leading/trailing spaces as duplicates.

Will it tell me how many lines were removed?

Yes, the removed count and remaining line count are shown live.

Remove Duplicate Lines

Deduplicate lines of text with flexible matching.

Works Offline

Privacy First

No Login

No API

Input lines

Case-insensitive Trim lines Keep last occurrence Sort result

Result

Total lines

Removed

Remaining

About the Remove Duplicate Lines

Remove duplicate lines from any list or text block, with options for case-insensitive matching, trimming whitespace, keeping the first or last occurrence, and sorting the final result.

Examples

Duplicate list

apple
banana
apple

Output

apple
banana

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser