Email lists
Leave case sensitivity off. Email addresses are not case sensitive in practice.
Remove Duplicate Lines
Clean up email lists, keyword lists, product codes or any list where the same line appears more than once. Paste it in and get a list with every entry appearing only once.
- 100% free
- No sign-up
- Runs in your browser
How to use
How to use the Remove Duplicate Lines
- Paste your list, one item per line.
- Choose your options: case sensitivity, spaces, empty lines and sorting.
- Copy the cleaned list. The counter shows how many duplicates were removed.
Private by design. Your text is processed in your browser. Nothing you type or paste is sent to a server or stored.
About this tool
Why lists end up with duplicates
Duplicates creep in whenever lists are merged: two spreadsheets of contacts, keywords from several research tools, or product codes exported more than once. Sending the same email twice or bidding twice on the same keyword wastes time and money.
By default, "Apple" and "apple" are treated as the same line and extra spaces are ignored, which is what most people want for emails and keywords. Turn on case sensitivity when capitalisation matters, for example with passwords or product codes. The first occurrence of each line is kept in its original order.
Good to know
Tips for clean lists
Keyword lists
Combine with the text sorter to group similar terms.
Spreadsheets
Copy a single column from Excel or Google Sheets and paste it here.
Large lists
Tens of thousands of lines are handled instantly in modern browsers.
FAQ
Remove Duplicate Lines FAQs
Is the original order kept?
Yes, unless you tick Sort result. The first time each line appears is kept.
Can I remove duplicates from Excel data?
Yes. Copy the column, paste it here, then paste the result back.
Does it treat spaces as different?
Not by default. Untick Ignore extra spaces to treat them as different.
Is my list uploaded?
No. It is processed in your browser.
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