Duplicate Line Remover
Remove repeated lines while preserving their first occurrence.
Your input is processed locally in your browser. It is not saved, logged, or sent with analytics.
0 chars
Run: Ctrl/⌘ + Enter · Clear: Ctrl/⌘ + Shift + X
Unique lines
Enter a value to begin.
What this calculator does
Deduplicate lines locally with case, trimming, and blank-line options.
Inputs and what they mean
- Lines
- — text value.
How to use it
- Paste or enter content in the editor.
- Adjust any options for the result you need.
- Copy or download the locally processed output.
Formula
Lines are compared in original order; the first matching line is preserved.
Worked example
Remove repeated names
Preserve first occurrences while removing repeated lines.
Reading the result
The unique lines appears in the output box and can be copied straight out. Nothing you paste leaves your browser.
Limitations and assumptions
Results depend entirely on the figures you enter and are rounded for display. They are for general information and education, not professional advice.