Remove Duplicate Lines
Remove duplicate lines from text, trim spaces, drop empty lines, and sort alphabetically. Free, instant, private — clean up lists in your browser.
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About Remove Duplicate Lines
Paste any list and instantly remove duplicate lines. Options to ignore case, trim surrounding spaces, remove empty lines, and sort A→Z or Z→A. Shows how many duplicates were removed. Great for cleaning email lists, keyword lists, CSV columns, and any text data. Runs entirely in your browser — nothing is uploaded.
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Your privacy is built in
Everything in Remove Duplicate Lines runs locally in your browser — your data never leaves your device and is never uploaded to a server, so nothing you enter is stored or seen by anyone else. No account, no sign-up, no watermark, and completely free.
Frequently asked questions
Can it ignore case when finding duplicates?
Yes — enable "case-insensitive" so "Apple" and "apple" count as the same.
Can it also sort the lines?
Yes, sort A→Z or Z→A, or keep the original order.
Is there a size limit?
It handles large lists easily, all in your browser with nothing uploaded.