Duplicate Line Remover

It scans your text line by line and removes any duplicate lines, keeping only unique entries. You can also choose to ignore case or trim whitespace.

Paste your text, choose options (case-sensitive, trim whitespace), click Remove Duplicates, and copy the cleaned result.

Completely free with unlimited use. No signup required.

Yes — all processing happens in your browser. No data leaves your device.

Yes, by default duplicate lines are removed while preserving the order of first occurrence.