Data & Text
Duplicate Line Remover
Paste any block of text and instantly remove duplicate lines. Options: case-insensitive matching, trim whitespace before comparing, sort the result alphabetically, and show a count of removed lines. Useful for cleaning email lists, keyword lists, and log files.
Runs in your browser
Nothing uploaded
Free, no signup
Ctrl + Enter to run · Recent brings back your last inputs · Everything stays in this browser
FAQ
Duplicate Line Remover: questions
Does order matter?
By default, the first occurrence of each line is kept and subsequent duplicates are removed, preserving original order. Enable "sort" to alphabetize the output instead.
What counts as a duplicate?
By default, lines must match exactly (case-sensitive). Enable "ignore case" to treat "Apple" and "apple" as duplicates.
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