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Remove Duplicate Lines - Find and Delete Duplicates Online

Find and remove duplicate lines from any list instantly. Keeps the first copy of each line in its original order. Free online tool for emails, names, keywords and data.

About the Remove Duplicate Lines

Paste a list with one item per line and this tool removes every repeated line, keeping only the first copy of each in the original order. Use it to clean email lists, names, keywords, URLs, product codes or any data copied from a spreadsheet. Blank lines are removed and lines that differ only by extra spaces are treated as duplicates.

How to use it

  1. Paste your list into the input box, one item per line.
  2. Duplicate lines are removed instantly.
  3. Click Copy to use the cleaned, unique list.

Frequently Asked Questions

How do I remove duplicate lines from a list?
Paste the list into the box above with each item on its own line. Every repeated line is removed and only the first copy is kept, in the same order as your original list. Copy the result with one click.
Is it case sensitive?
Yes. "Apple" and "apple" are treated as different lines. To ignore case, convert the list with the Lowercase Converter first, then remove duplicates.
Does it change the order of my list?
No. The first copy of each line stays in its original position. If you also want the list sorted, run the result through the Alphabetical Order Generator.
Can I remove duplicate emails or keywords?
Yes. Paste one email, keyword or URL per line. Extra spaces before or after an item are ignored when checking for duplicates, which is common in data copied from spreadsheets.
How do I remove duplicates in Excel or Google Sheets instead?
In Excel, select the column and use Data > Remove Duplicates. In Google Sheets, use Data > Data cleanup > Remove duplicates, or the =UNIQUE() formula. This online tool is quicker for lists you copy from emails, documents and websites.
Is there a limit on list size?
No. Lists with thousands of lines are processed instantly in your browser, and nothing is uploaded.

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