How to use Duplicate Line Remover
Remove repeated rows while preserving first-seen order, with case and whitespace controls.
- 01Enter one item per line.
- 02Choose case, trimming, and blank-line behavior.
- 03Copy or download the cleaned result.
Preserving useful order
The first occurrence of each unique line is retained. Optional case-insensitive and whitespace-trimming comparisons help normalize messy input.
Handling blank lines
Blank lines are removed by default for a compact list. Turn that option off when empty rows are meaningful separators.
Frequently asked questions
Will the list be reordered?
No. Every unique line stays at its first occurrence.
Can Apple and apple be treated as duplicates?
Yes. Enable case-insensitive comparison.