About this tool
Clean a pasted list or TXT file by keeping only the first occurrence of each line. Optionally ignore letter case and surrounding spaces when comparing. The original text of the first occurrence stays intact. Downloads use LF line endings.
How to use Remove Duplicate Lines
- Paste a list or choose a TXT file.
- Choose case and spacing options, then select Remove Duplicate Lines.
- Download the text file containing the unique lines.
Frequently asked questions
Does this sort the list?
No. The first occurrence stays in its original position and later matching lines are removed.
Are blank lines duplicates?
Yes. Repeated empty lines are reduced to one. With surrounding spaces ignored, whitespace-only lines also match.
Does ignoring spaces edit the remaining lines?
No. It changes matching only. The first matching line retains its original spaces and capitalization.