Remove Duplicate Lines
Runs in your browser. Your files never leave your device.
How we keep your files private
How to use Remove Duplicate Lines
- Paste your list, one item per line.
- Choose whether to ignore case, trim spaces and drop empty lines.
- Copy the cleaned list.
Common uses
- Cleaning email or keyword lists.
- De-duplicating log lines.
- Merging lists from several sources.
About this tool
Remove repeated lines from a list while keeping the first occurrence of each. You can ignore letter case, trim surrounding whitespace and drop empty lines. Handy for email lists, keyword lists and logs.
Next steps
Frequently asked questions
Which duplicate is kept?
The first occurrence of each line is kept and later ones are removed.
Does it ignore case?
Only if you tick the Aa option.
Does the order change?
No, the remaining lines stay in their original order.
Are my files uploaded to a server?
No. Everything runs inside your browser on your own device, so your files and text are never sent anywhere.
Is it really free?
Yes. There is no sign-up, no watermark and no limit on how often you use it.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers. Very large files may be slow on older phones.