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Duplicate Line Remover
Clean up lists, logs and exports by removing repeated lines while keeping the original order. Toggle case sensitivity and whitespace trimming to match your data. Everything stays in your browser.
HOW TO USE
- 1Paste your text with one line per row.
- 2The first occurrence of each line is kept in its original order. Output updates live.
- 3Switch between Case sensitive and Case insensitive to match "Apple" with "apple" or not.
- 4Switch between Trim whitespace and Keep whitespace to ignore or respect leading and trailing spaces.
- 5Copy the result with one tap, or load the built-in sample to see how it works.
EXAMPLE
INPUT
red green red blue green
OUTPUT
red green blue
FAQ
Which duplicate is kept?
The first occurrence of each line is kept, so the original order of first appearances is preserved.
What does Case sensitive do?
When on, "Red" and "red" are treated as different lines. When off, they are considered duplicates of each other.
What does Trim whitespace do?
It strips leading and trailing spaces before comparing, so "red " and "red" count as the same line.
Is my text uploaded?
No. Everything runs in your browser.