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Remove Duplicate Lines
Remove duplicate lines from text online for free.
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Clean up lists, logs, and datasets by removing duplicate lines in seconds. Options include case-insensitive deduplication, whitespace trimming, and empty line removal. The live output shows how many duplicates were removed. Works entirely in your browser.
Frequently Asked Questions
Does it preserve line order? expand_more
Yes. The first occurrence of each line is kept and subsequent duplicates are removed, preserving the original order.