Remove Duplicate Lines
Remove duplicate lines from any text. Case-sensitive toggle, trim whitespace, sort output. Free and instant.
Runs in your browser
No account needed
Completely free
About Remove Duplicate Lines
Clean up text by removing duplicate lines quickly. Perfect for cleaning keyword lists, URL lists, email addresses, or any line-based data. Optionally sort the output alphabetically. All processing happens instantly in your browser with no data sent to servers.
Frequently asked questions about Remove Duplicate Lines
Toggle case sensitivity: enabled means 'Apple' and 'apple' are different; disabled treats them as the same.
Yes. Enable the sort toggle to sort lines alphabetically after removing duplicates.
Yes. Enable 'Trim whitespace' to ignore leading and trailing spaces when comparing lines.
Empty lines are treated as unique items. Trim whitespace will treat lines with only spaces as empty lines.