Free Online Remove Duplicate Lines
Remove duplicate lines from your text. Keep unique lines while eliminating repet...Remove duplicate lines from your text. Keep unique lines while eliminating repetition with case and whitespace options.
Input
Unique Lines
Tool Features
Why Use Free Online Remove Duplicate Lines?
Clean Data
Remove duplicate lines for cleaner datasets, lists, and text files.
Statistics Included
See exactly how many duplicates were removed and how many unique lines remain.
Case Options
Choose case-sensitive or case-insensitive duplicate detection to match your needs.
View Duplicates
Option to show only the duplicates for analysis before removing them.
Common Uses for Remove Duplicates
Data Cleaning
Remove duplicate entries from CSV files, email lists, and data exports.
Code Cleanup
Remove duplicate import statements, configuration entries, or log entries.
List Deduplication
Clean up lists of names, URLs, keywords, or any line-based data.
Text Processing
Prepare text for further analysis by eliminating redundant lines.
How It Works
Enter Your Text
Paste or type your text with one item per line. The tool works with any text content.
Configure Options
Set case sensitivity, whitespace trimming, and whether to keep empty lines.
Get Unique Lines
Instantly see unique lines with statistics showing how many duplicates were removed.
Tips for Best Results
Case Insensitive
Keep case-insensitive mode enabled (default) to catch duplicates like 'Apple' and 'apple'.
Preview First
Use 'Show duplicates only' to preview what will be removed before deduplicating.
Trim Whitespace
Enable 'Trim whitespace' to catch lines that differ only by leading/trailing spaces.