Remove Duplicate Lines
Remove duplicate lines from text. Sort, trim, and clean up text data.
How to Use This Tool
1. Paste your text containing duplicate lines into the input area.
2. Toggle options: enable or disable case sensitivity, whitespace trimming, and alphabetical sorting.
3. Click "Remove Duplicates" to get your deduplicated text.
4. Review the stats showing how many duplicates were removed, then copy the result.
FAQ
Does this tool preserve the original order?
Yes, the first occurrence of each line is kept in its original position. If you enable "Sort Output", the unique lines will be sorted alphabetically instead.
What does "Trim Whitespace" do?
When enabled, leading and trailing spaces on each line are removed before comparing. This means " hello " and "hello" would be treated as duplicates.
How does case sensitivity work?
When case sensitivity is on (default), "Hello" and "hello" are treated as different lines. Turn it off to treat them as duplicates.