Donaldson R F Merge Email Lists
Combine up to four lists into one clean list with no duplicates.
Your files never leave your device. Everything runs in your browser and nothing is uploaded. Limit: a maximum file size.
How it works
The lists are joined in order — everything from list 1, then any new addresses from list 2, and so on — and duplicates (ignoring upper and lower case) are removed. You can paste text or open a file into each box. The total and the number of duplicates removed are shown so you can check nothing went missing.
To see what the lists have in common before merging, use compare two email lists; to cut the result into smaller files, use split an email list.
Frequently asked questions
How many lists can I merge?
Four at once here. To merge more, merge the first four, then merge that result with the next lists.
Is the original order kept?
Yes: earlier lists first, and the first copy of each address stays.
Is my data uploaded?
No. Everything happens in your browser.