Remove Duplicate Lines
Remove duplicate lines from text while optionally preserving the original order. Case-sensitive or case-insensitive matching.
About deduplication
Removing duplicate lines is a common task when cleaning data, processing log files, preparing email lists, or consolidating configuration entries. This tool takes a block of text, identifies lines that appear more than once, and outputs only unique lines.
You can choose to preserve the original order (keeping the first occurrence of each line) or sort the output. Case-insensitive mode treats lines that differ only in capitalization as duplicates.
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