Free Remove Duplicate Lines
Paste a list to remove duplicate lines instantly: keywords, URLs, emails or anything else. Choose to ignore case, trim spaces, drop blanks and sort.
Runs in your browser · nothing is uploaded
Runs in your browser. Your text isn't uploaded or stored.
How to use the free remove duplicate lines
- 01
Paste your list, one item per line.
- 02
Pick the options you need.
- 03
Copy the cleaned list.
Clean lists in one step
Merging keyword lists from several tools, combining email exports or collecting URLs always leaves duplicates. This keeps the first occurrence of every line and removes the rest, in the original order unless you choose to sort.
"Ignore case" treats "SEO Tools" and "seo tools" as the same line; "trim spaces" ignores stray spaces at the start and end of lines, the usual cause of duplicates that look identical.
Tips for using the remove duplicate lines
Trim before comparing
Most "identical" lines that aren't removed differ by a trailing space. Keep "Trim spaces" on.
Merge keyword lists
Combine exports from several keyword tools, remove duplicates, then group them with the keyword clustering tool.
Sort to spot near-duplicates
Sorting A–Z puts similar lines next to each other, so variants like plurals are easy to spot.
Check URL lists
After deduplicating URLs, test them with the HTTP status code checker.
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Remove Duplicate Lines FAQ
Is there a limit on list size?
No fixed limit. Lists of hundreds of thousands of lines work in most browsers.
Does it keep the original order?
Yes, unless you tick "Sort A–Z".
Is my list uploaded?
No. Everything happens in your browser.
Is case ignored by default?
No. Tick "Ignore case" to treat "SEO" and "seo" as the same line.
Which copy is kept?
The first occurrence of each line, in its original position.
Can I remove duplicates from a CSV?
Yes, line by line. Whole rows that are identical are removed.
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