Remove Duplicates
Remove duplicate lines from text while preserving the first occurrence
1. What is duplicate removal?
Duplicate removal is the process of identifying and eliminating repeated entries from a list or text. This tool helps clean up data by keeping only unique entries while maintaining the original order and preserving the first occurrence of each item.
2. How does it work?
Removal Process
This tool removes duplicate lines from your text, keeping only the first occurrence of each unique line. The order of lines is preserved.
Case Sensitivity
When case-sensitive mode is off (default), 'Apple' and 'apple' are considered duplicates. When enabled, they are treated as different lines.
3. Examples
Basic duplicate removal
apple, banana, apple, cherry → apple, banana, cherry (removed 1 duplicate)Case insensitive (default)
Apple, banana, apple → Apple, banana (removed 1 duplicate)Case sensitive
Apple, banana, apple → Apple, banana, apple (no duplicates when case sensitive)