Remove Duplicate Lines
Paste a list and remove duplicate lines, keeping the first occurrence of each. Case-sensitive toggle and blank-line cleanup included.
Case-sensitive
Trim whitespace on each line
Remove blank lines
0 duplicate lines removed.
Common questions
Does order matter?
The first occurrence of each line is kept, later duplicates are removed. The remaining lines stay in their original order.
What counts as a duplicate with case-sensitive off?
Lines that are identical except for letter casing, "Apple" and "apple" would be treated as the same line and only the first one kept.
Is my text sent anywhere?
No, deduplication happens entirely in your browser as you type. Nothing is uploaded.