Donaldson R F Compare Two Email Lists
Paste or open two lists and see what is unique to each and what they have in common.
Your files never leave your device. Everything runs in your browser and nothing is uploaded. Limit: a maximum file size.
How it works
Each list is read as one address per line (commas and semicolons also work) and compared without regard to case. An address that appears several times is listed once. Only in A is handy for finding new contacts or people who have left; in both shows the overlap between two mailing lists.
To join the lists into one, use merge email lists; to tidy a single list first, remove duplicate emails.
Frequently asked questions
Does the order matter?
No. Results keep the order in which addresses first appeared in each list.
What if the same address is in a list twice?
It is counted and shown once.
Is anything uploaded?
No. Both lists stay in your browser.