Example
apple
banana
cherry
Remove Duplicate Lines
Remove duplicate lines from any text instantly in your browser. Free online duplicate line remover with optional sort and case-insensitive matching.
Enter the values below, then press Calculate (or press Enter). The calculator updates your results instantly. Try different values to see how your inputs change the outcome.
- Text with lines — enter a value. A typical Text with lines would be Paste lines of text here, one per line….
- Sort output — enter a yes/no option.
- Ignore case when matching — enter a yes/no option.
- Review your results — the key output is highlighted, with supporting figures below.
Loading calculator…
Results
Unique lines
| Detail | Value |
|---|---|
| Original lines | |
| Unique lines |
What is this calculator for?
Remove duplicate lines from any block of text, keeping only unique entries, with optional sorting.
How to Use This Calculator
Enter the values below, then press Calculate (or press Enter). The calculator updates your results instantly. Try different values to see how your inputs change the outcome.
- Text with lines — enter a value. A typical Text with lines would be Paste lines of text here, one per line….
- Sort output — enter a yes/no option.
- Ignore case when matching — enter a yes/no option.
- Review your results — the key output is highlighted, with supporting figures below.
What You'll Need
- Text with lines
- a value · required
- Sort output
- a yes/no option · optional
- Ignore case when matching
- a yes/no option · optional
About This Calculator
This duplicate line remover scans your text line by line and keeps only the first occurrence of each line, telling you how many duplicates it dropped.
Toggle sorting to alphabetize the result, or ignore-case matching to treat "Apple" and "apple" as the same line. It is ideal for sanitizing lists before import, comparison, or analysis.
Deduplication happens locally — nothing is uploaded.
Worked Examples
Frequently Asked Questions
Will it preserve my original order?
By default yes — the first occurrence of each line keeps its original position. Enable sort to reorder the result alphabetically.
What counts as a duplicate?
A line is a duplicate if it exactly matches a previous line. Enable "Ignore case" to also merge lines differing only by capitalization.