Duplicate Line Remover
Paste text and instantly remove duplicate lines, keeping the first or last occurrence. Free to use, no signup required for occasional use.
What is the Duplicate Line Remover?
The Duplicate Line Remover cleans up lists, logs, spreadsheet exports, and any line-based text by finding and removing repeated lines. You can choose to keep the first or last occurrence of each duplicate, and toggle case-sensitivity so 'Apple' and 'apple' are treated as the same line or as different lines depending on your needs. It's handy for cleaning email lists, keyword lists, log files, or CSV-like data pasted as plain text.
How to use it
Paste your lines into the text box, choose whether to keep the first or last occurrence of each duplicate, toggle case-sensitivity if needed, and click Remove Duplicates. The cleaned text appears below along with a count of how many lines were removed, ready to copy.
Frequently asked questions
Does order matter?
Yes — with 'keep first' the earliest occurrence of each line is kept; with 'keep last' the final occurrence is kept and earlier ones are removed.
Is the check case-sensitive by default?
No, by default 'Text' and 'text' are treated as duplicates. Enable the case-sensitive toggle to treat them as different lines.
Does it ignore blank lines?
Blank lines are treated like any other line, so repeated blank lines will also be deduplicated.