Remove Duplicate Lines
Remove duplicate lines while optionally keeping original order.
Keeps the first occurrence of each line. Removed 2 duplicates.
Input
Unique lines
In-depth explanation
Paste a list and keep the first occurrence of each line. Optionally treat “Apple” and “apple” as the same when ignoring case. Everything runs locally in your browser — your inputs are not uploaded to produce the result.
The first time a line appears is kept; later repeats are dropped. Lines that differ only by capitalisation are treated as duplicates. The first spelling you used is kept.
Blank lines are treated like any other line — the first blank is kept, further blanks are duplicates. Tweak the inputs above to compare options, then copy or note the result you need.
Frequently asked questions
Related tools
Explore similar utilities you might find useful next.