What you’ll need
An address list or CSV with an email column; optional suppression addresses.
Email TOOL · FREE TO USE
Email List Cleanup & Comparison
Deduplicate addresses and compare against your suppression list privately.
Runs on your device · Files stay privateYour email workspace
How it works
Conservative address normalization, duplicate removal and exact suppression comparison.
Know the limits
No mailbox existence checks. Plus tags and dots are retained; case handling is explicit.
GET FROM A QUESTION TO A NEXT STEP
Get a clearer result with Email List Cleanup & Comparison
Deduplicate addresses and compare against your suppression list privately. An address list or CSV with an email column; optional suppression addresses. Review the supported scope below before adding a large file or using the result in a campaign.
How to use Email List Cleanup & Comparison
Open Email List Cleanup & Comparison and inspect its input labels. An address list or CSV with an email column; optional suppression addresses.
Use the synthetic example where available, or choose your own supported file. Set the options deliberately; processing takes place in your browser.
Run the workflow, read any warnings and inspect the output. Download the result only after checking the values or file preview; clear the workspace when finished.
What do the results mean?
Conservative address normalization, duplicate removal and exact suppression comparison. No mailbox existence checks. Plus tags and dots are retained; case handling is explicit.
What to do next
Check a small representative input first. For exported assets, reopen the downloaded file in its intended application before using it in production.
Keep the scope in mind
No mailbox existence checks. Plus tags and dots are retained; case handling is explicit.
Common questions about Email List Cleanup & Comparison
Does Email List Cleanup & Comparison save my input?
This workflow uses browser memory. Downloads are saved by your browser, but tool inputs are not submitted to a server or stored by this tool.
What should I do if a result is unavailable?
Check the input format, units and limits. No mailbox existence checks. Plus tags and dots are retained; case handling is explicit. An unavailable result does not establish that a campaign, document or email address is valid or invalid.