Order preserved
By default, the first occurrence stays exactly where it was and later duplicates are removed.
All tools / Remove Duplicate Lines
One of
each line.
Clean lists, exports and pasted text while keeping the first occurrence in place.
Everything runs in your browser. The text is never uploaded.
Paste one item per line.
You define “same”
Choose whether capitalization and surrounding spaces should make two lines different.
Works offline
Once loaded, the calculation happens locally and your lists never become server data.
Clean duplicate lines without a spreadsheet
Paste email lists, keywords, URLs, IDs, log fragments or any one-item-per-line text. Choose the comparison rules and remove duplicates. Empty lines can be kept or removed, and sorting is optional.
Are my lines stored?
No. Anonymous analytics can record that a cleanup completed, but never includes your pasted content.