Remove Duplicate Lines
Paste a list and instantly remove all duplicate lines, keeping only unique entries.
Remove Duplicate Lines
Input
Output
How to Use
- Paste your list of lines into the input box.
- Choose case-sensitive or case-insensitive matching.
- Enable "Trim whitespace" to ignore leading/trailing spaces when comparing.
- The deduplicated result appears instantly in the output box.
Frequently Asked Questions
QDoes it preserve order?
Yes — the first occurrence of each line is kept and the original order of unique lines is preserved.
QCan I match case-insensitively?
Yes — toggle "Case insensitive" to treat "Apple" and "apple" as the same line.
QAre blank lines treated as duplicates?
Yes — multiple consecutive blank lines are collapsed to one blank line unless you enable "Remove blank lines" to strip them entirely.
About This Tool
Useful for cleaning mailing lists, keyword lists, code import statements, or any text where you need unique entries. All processing happens in your browser.