About the Remove Duplicate Lines
Remove duplicate lines from lists, logs, CSV columns or any text while keeping the first occurrence of each line in its original position. Options let you ignore case, trim surrounding whitespace before comparing and drop empty lines.
The status bar tells you how many lines were removed.
How to use it
- Paste your text.
- Adjust the options.
- Copy the deduplicated result.
Features
- Keeps original order
- Case-insensitive option
- Whitespace trimming
- Removed-line count
Frequently asked questions
Is the order preserved?
Yes. The first occurrence of each line stays where it was; later duplicates are removed. Use Sort Lines if you also want the result sorted.
Is my data uploaded anywhere?
No. All processing happens in JavaScript inside your browser tab. Your input is never sent to a server, logged or stored, so it is safe to use with internal or sensitive data.