Remove Duplicate Lines
Removes repeated lines from your text while preserving the original order.
Input
How to use Remove Duplicate Lines
- 1
Paste your text
Enter or paste the lines you want to clean into the input box.
- 2
Set the options
Toggle Case Sensitive and Trim Whitespace to control how lines are compared for duplicates.
- 3
Remove duplicates
Click Remove Duplicates to strip out repeated lines while keeping the first occurrence of each.
- 4
Copy the result
Use the copy button on the output to save your deduplicated text.
Frequently asked questions
Does it keep the original line order?
Yes. The tool removes later repeats but preserves the first occurrence of each line in its original position, so the order of your text stays intact.
Is the comparison case sensitive?
You decide. By default it treats lines with different capitalization as different, but turning off Case Sensitive makes Apple and apple count as the same line.
What does the Trim Whitespace option do?
It ignores leading and trailing spaces when comparing lines, so two lines that differ only by extra spaces are treated as duplicates.
Which copy of a duplicate line is kept?
The first time a line appears is kept, and every identical line after it is removed from the output.
Is my text uploaded to a server?
No. All processing happens locally in your browser, so your text never leaves your device, and the tool is free with no registration.
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