Remove Duplicates
Remove duplicate lines, empty lines, and trim whitespace. Case-sensitive option and result statistics.
Paste text and click Remove Duplicate Lines to clean up.
About This Tool
This free online text cleaner removes duplicate lines from any text instantly. All processing happens locally in your browser — your data is never sent to a server. Ideal for cleaning up mailing lists, log files, data exports, and more.
Case Sensitive Mode: When enabled, "Apple" and "apple" are treated as different lines. When disabled (default), letter case is ignored and both are considered duplicates.
Remove Empty Lines: Automatically strips blank lines and whitespace-only lines from the output, leaving only meaningful content.
Trim Whitespace: Removes leading and trailing spaces/tabs from each line before comparing, so lines that differ only by indentation are still detected as duplicates.
Result Statistics: See exactly how many lines were removed and how many remain, so you can verify the cleaning was effective. One-click copy or download the cleaned result.