Duplicate Line Remover
Remove duplicate lines while preserving first occurrence and order. Clean pasted lists and line-separated data. Choose whether capitalization and outer spaces should matter; the first occurrence of each unique line is retained.
Use the tool
Enter your values, then run it. The result is generated in your browser.
Result
Calculated
How to use Duplicate Line Remover
- Paste one item per line.
- Select case and whitespace rules.
- Check output for entries that should remain distinct.
Formula and assumptions
Lines are compared in order using a comparison key determined by trim and case options. First occurrence wins.
The tool compares complete lines, not semantic equivalence or columns within a spreadsheet.
Frequently asked questions
Is order preserved?
Yes, the first occurrence stays in its original order.
Can it ignore case?
Yes, choose the case-insensitive option.
Are blank lines removed?
Blank lines are treated as entries; use text cleanup first if you want them removed.
About this tool
Clean pasted lists and line-separated data. Choose whether capitalization and outer spaces should matter; the first occurrence of each unique line is retained.
No account is required. The tool runs in this browser and this starter build has no form-submission backend. See the method and assumptions before relying on estimates.