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Remove Duplicate Lines
TextFree online duplicate line remover. Paste any list or text and remove duplicate lines instantly. Case-sensitive option and sort included.
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Quick answers for Remove Duplicate Lines
How does the Remove Duplicate Lines tool decide what counts as a duplicate?
By default, two lines are duplicates when they match after lowercasing. Toggle Case-sensitive to treat "Apple" and "apple" as different, or enable Trim whitespace to ignore leading and trailing spaces when comparing.
Does it preserve the original order?
Yes. The first occurrence of each unique line is kept in its original position; later duplicates are dropped. This is the behaviour most people want when cleaning a list.
Can I skip empty lines?
Yes. Toggle Skip empty and the tool drops any line that is blank (or contains only whitespace) before deduping. Useful when pasting text with stray newlines.
Is there a limit on input size?
No fixed limit - the tool runs in your browser. Tens of thousands of lines process in well under a second; very large inputs are bounded only by your device's memory.
Will my data be uploaded?
No. The Remove Duplicate Lines tool is fully client-side. Whatever you paste - addresses, IDs, log lines - never leaves your browser.