Duplicate Line Remover
Remove duplicate lines from text. Supports case-sensitive and case-insensitive matching.
Processed on your device — never uploaded
Input
Output
Frequently Asked Questions
How do I remove duplicate lines from text?
Paste your text into the input field and all duplicate lines are automatically removed, keeping only the first occurrence of each unique line.
What is the difference between case-sensitive and case-insensitive duplicate removal?
Case-sensitive treats "Hello" and "hello" as different lines, while case-insensitive considers them duplicates and keeps only the first one.
Does this tool preserve the original line order?
Yes, the tool keeps lines in their original order and only removes subsequent duplicate occurrences.
Can I remove duplicates from a large text file?
Yes, this tool processes text entirely in your browser with no upload limits, so it handles large texts efficiently.