Free Online Remove Duplicate Lines Tool
Paste your text and instantly remove all duplicate lines with one click. Configure whether matching should be case-sensitive, whether to trim whitespace before comparing, and whether to sort the output. This tool is invaluable for cleaning up data exports, log files, email lists, keyword lists, and any text document with repeated lines.
8
Original lines
5
Unique lines
3
Removed
Common questions
What does 'case-insensitive' matching mean?
When case-insensitive mode is enabled, 'Hello' and 'hello' are treated as duplicates. Only the first occurrence is kept. This is useful for cleaning email lists or keyword sets where capitalization varies.
Will the original line order be preserved?
Yes, by default the tool preserves the original order and keeps the first occurrence of each unique line. You can optionally sort the output alphabetically after deduplication.