Input
Output
0
Total lines
0
Unique
0
Duplicates
0
Removed
Remove duplicate lines instantly. Keeps the first occurrence, optional sorting.
The Duplicate Line Remover strips repeated lines from a list, leaving only unique entries — a fast way to clean email lists, keyword sets, logs, or any line-based data.
It can preserve the original order or sort the result, so you get exactly the clean list you need.
The tool reads each line, tracks which have been seen, and outputs only the first occurrence of each, optionally sorting the result. Case sensitivity and whitespace trimming can be applied so near-duplicates collapse correctly.
Running locally, it deduplicates thousands of lines instantly and keeps your data private.
Paste 1,000 email addresses with scattered repeats and the tool returns the unique set plus a count, ready to paste into a mailing tool without duplicate sends.
Yes — you can preserve order or sort the unique results.
You can choose; case-insensitive matching collapses 'A' and 'a'.
No — deduplication happens in your browser.
Thousands, limited only by practical browser memory.
Yes — 25 languages, free to use.