Remove Duplicate Lines
Remove duplicate lines from your text instantly. Clean up lists, CSV data, log files, and any content with repeated lines.
How to Remove Duplicates
- Paste your text with duplicate lines
- Select case sensitivity preference
- Click Remove Duplicates
- Copy the cleaned text
About This Tool
Duplicate lines are common in data exports, log files, and lists. Manually finding and removing them is tedious and error-prone. Our tool instantly identifies and removes repeated lines, leaving you with clean, unique content.
The case-sensitive option determines whether "Apple" and "apple" are treated as duplicates. Enable it for exact matching, or disable it to remove lines that differ only in capitalization.
The trim whitespace option helps catch duplicates that have extra spaces. Lines like "Hello" and "Hello " would normally be treated as different, but with trimming enabled, they're recognized as duplicates.
Original order is preserved by default, keeping the first occurrence of each line. This is important for maintaining document structure and logical flow in your content.
The tool handles large texts efficiently, processing thousands of lines quickly right in your browser without any upload delays.