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Remove Duplicate Lines
Paste a list and instantly delete repeated lines. Handy for cleaning keyword lists, emails, URLs or data before import. Free, private and one click.
How to remove duplicate lines
- Paste your list into the input box, one item per line.
- Choose your options: case-sensitive matching, trimming spaces, or A–Z sorting.
- Click Remove Duplicates and copy the clean result from the output box.
About this tool
Duplicate rows in a list cause real problems — duplicate keyword rows skew SEO research, repeated emails annoy subscribers, and duplicated data breaks imports. This free tool keeps only the first occurrence of each line and drops the rest in a single click.
By default, matching ignores leading and trailing spaces (a line with an extra space still counts as a duplicate) and is case-insensitive. Turn on Case-sensitive if "Apple" and "apple" should be treated as different lines, and Sort output A–Z for an alphabetised clean list.
FAQs
Is the duplicate line remover free?
Yes — free forever with no sign-up. All processing happens in your browser.
What does the case-sensitive option do?
When on, lines that differ only in capitalisation (e.g. Apple vs apple) are treated as different lines and both are kept.
Is my list data kept private?
Yes. The tool runs entirely in your browser, so your list never leaves your device.
Are blank lines kept?
Blank lines are treated as empty duplicates — only one (or none with trimming) survives.