Does it preserve blank lines?

Yes, blank lines are treated as valid lines and the first blank line is preserved. Subsequent blank lines are removed.

Is the comparison case-sensitive?

Yes, 'Apple' and 'apple' are treated as different lines. For case-insensitive deduplication, first convert to lowercase, deduplicate, then optionally convert back.

Duplicate Line Remover

Filter out duplicate lines from text list while retaining order.

Text Tools Runs in your browser. Files never leave your device.

Input Text

9 words · 54 chars

Result

Hello World! This is a sample text for transformation.

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