Remove a suppression list
Use A minus B when List B contains emails that should be excluded from List A.
Free browser-based email compare tool
Compare two email lists.
Paste List A and List B. MailSniper finds emails only in List A, common emails, emails only in List B, and a merged unique list without uploading pasted text.
List A emails
0
List B emails
0
Common emails
0
A minus B
0
Compare source lists
Compare runs in your browser. Use List B as a suppression list when you need the emails from List A that are not already in another list.
Suppression cleanup
Use A minus B to remove an existing customer, unsubscribe, or exclusion list from a new list.
Merge without duplicates
Use merged unique when two sources need to become one clean list.
Copied to clipboard
Find overlap
Use common emails to see which addresses appear in both sources before import or cleanup.
Compare locally
The compare tool runs in the browser, so pasted lists do not need to be uploaded for processing.