Free OnlineText Tools
Remove Duplicate Lines
Remove duplicate lines from text instantly. Keep unique lines and eliminate repetition with this free online tool.
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Options
Key Features — Remove Duplicate Lines
Remove exact duplicate lines
Case-sensitive and case-insensitive modes
Option to trim whitespace before comparing
Shows count of removed duplicates
Preserves original line order
Why Use This Tool — Remove Duplicate Lines
Free Online Remove duplicate linesDelete duplicates — for EveryoneFast & Easy Unique linesDeduplicate text — 100% FreeFree Online Remove repeated lines
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Frequently Asked Questions — Remove Duplicate Lines
Does the tool keep the first occurrence of a duplicate line?
Yes. When duplicates are found, the tool keeps the first occurrence and removes all subsequent identical lines. The order of remaining unique lines is preserved exactly as they appeared in your original text.
Can I do a case-insensitive comparison?
Yes. Toggle the case-insensitive option and the tool will treat "Hello" and "hello" as duplicates. In this mode, the first occurrence is kept with its original casing while later variations are removed.
What if my duplicate lines have extra spaces?
Enable the "Trim whitespace" option to strip leading and trailing spaces before comparing lines. This way, " Hello " and "Hello" are treated as duplicates even though they have different spacing.