Remove Duplicate Lines
Remove duplicate lines from text. Keep only unique lines with case sensitivity options. Free online duplicate line remover.
How to Remove Duplicate Lines
- 1 Paste your text containing duplicate lines into the input area
- 2 Choose whether to use case-sensitive matching
- 3 Optionally enable 'Trim Whitespace' to ignore leading/trailing spaces
- 4 Click 'Remove Duplicates' to process the text
- 5 Copy the deduplicated output containing only unique lines
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Last updated: January 15, 2026 · v2.1