Remove Duplicate Lines
Delete repeated lines from any list or text instantly and privately in your browser.
Result
Copied a long list of e-mails, keywords, URLs, or log entries and suspect half of it repeats? Deleting duplicates by hand is slow and error-prone: the same line can differ only by capitalization or an invisible trailing space.
This tool removes duplicate lines in one click and keeps everything on your device — the text is processed by your browser only, so confidential lists never travel to a server. Paste the text, choose the comparison options, and copy the cleaned result.
Matching is flexible: enable case-insensitive comparison so "Apple" and "apple" count as the same line, and whitespace trimming so indented copies are caught as well. You decide whether the first or the last occurrence of each repeated line survives, and empty lines can be preserved to keep paragraph structure.
After processing you see a short summary — how many lines were removed out of the total — and the unique lines remain in their original order, ready to paste back into your spreadsheet, code editor, or mailing list.