Home › Text Tools › Remove Duplicate Lines
Paste any list or text and strip duplicate lines instantly — with options for case-sensitive matching and whitespace trimming before comparison.
Add any multi-line content: a list of URLs, email addresses, keywords, product names, or any data with repeated entries.
Toggle case-sensitive matching (so “Apple” and “apple” are treated as different) and whitespace trimming (to match lines that differ only in leading or trailing spaces).
Get the deduplicated output with the number of duplicates removed shown.
Yes. The first occurrence of each line is kept in its original position. Only subsequent duplicate occurrences are removed. If you need the output sorted alphabetically as well, run it through the Sort Lines tool afterwards.
By default, two lines are duplicates if they are character-for-character identical, including capitalisation. Toggle case-insensitive mode to treat “URL”, “url”, and “Url” as the same line. Toggle whitespace trimming to ignore leading and trailing spaces when comparing lines.
Yes — that’s one of the most common uses. Paste in a messy keyword export, an email list with repeated entries, or a URL list copied from a spreadsheet and get a clean, unique-value list back in seconds.
No. All processing runs in your browser. Your list data is never transmitted to any server.
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Duplicate lines accumulate in every kind of list — keyword research exports, URL crawls, email lists, product feeds, and data copied from multiple sources all tend to contain repeated entries. Spotting and removing them manually is tedious and error-prone on lists longer than a few dozen lines. This tool processes any size list instantly, preserving original order and giving you control over whether case differences and whitespace variations count as duplicates. It shows how many duplicates were removed so you can confirm the cleanup worked correctly.
All processing runs in your browser. List data is never uploaded or transmitted to any server.
