Paste any list and remove duplicate lines instantly. Choose whether comparison is case-sensitive, trim whitespace, sort results, and remove blank lines. All processing is done locally — nothing is sent to a server.
Yes by default — the first occurrence of each line is kept and subsequent duplicates are removed. Turn on Sort to reorder alphabetically instead.
No by default — "Apple" and "apple" are treated as duplicates. Toggle Case sensitive to make them distinct.
No. All processing runs locally in your browser, so it's safe for email lists, keys, and other private data.