Remove Duplicate Lines

Paste any list — keywords, URLs, emails or data — and remove duplicate lines instantly, with case and whitespace options.

Free · No sign-upText Tools Writing

Paste a list of lines — keywords, URLs, email addresses, or any copied data — and instantly remove duplicates while keeping the first occurrence of each unique line, in its original order.

How to Use Remove Duplicate Lines

Paste your list into the text box, one item per line.
Choose whether to ignore case, trim spaces, and remove blank lines.
Click Remove Duplicate Lines, then copy the cleaned result.

Key Features

Removes duplicate lines while preserving the original order
Optionally ignores case so 'Apple' and 'apple' count as the same line
Optionally trims leading/trailing spaces before comparing
Optionally strips blank lines
Handles large pasted lists quickly

Who It's Useful For

Marketers cleaning up keyword or email lists
Developers deduplicating URLs or log lines
Anyone who's merged two lists and ended up with repeats

Practical Examples

Clean a list of keywords exported from two different tools
Remove repeated URLs from a crawled or scraped list
Merge two contact lists and remove duplicate email addresses

Tips for Better Results

By default, comparison ignores case and trims spaces — turn these off if you need an exact, character-for-character match
The first occurrence of each line is kept; later duplicates are removed
Blank lines are removed by default; uncheck that option to keep them

FAQ

Is 'Apple' treated as a duplicate of 'apple'?

Yes, by default comparison ignores case — uncheck 'Ignore case when comparing' if you need an exact match.

What happens to blank lines?

They're removed by default; uncheck 'Remove blank lines' to keep them in the result.

Which copy of a duplicate line is kept?

The first one that appears in your pasted text; every later repeat is removed.

How do I remove duplicate lines?

Paste your list into the text box, one item per line, choose whether to ignore case, trim spaces, and remove blank lines, then click Remove Duplicate Lines and copy the cleaned result.