Email Suppression List Scrubber

It's a free, privacy-safe tool that compares your mailing list against a suppression list to remove addresses that shouldn't receive emails. All processing happens in your browser and no email addresses are sent to any server.

Email addresses are converted into irreversible MD5 hashes before any comparison. This means the actual email addresses never leave your browser. Only the hashed values are compared, making the process completely privacy-safe.

When you convert an email list to hashes, the hashed list is stored on our server with a unique 8-character code. You can share this code with partners so they can scrub their mailing lists against your suppression list without ever seeing the actual email addresses.

Yes, completely free with no limits. We built it because clean email lists benefit the entire partner marketing ecosystem. Integr8 offers this as a free utility alongside our tracking platform.

Your email data never leaves your browser. CSV files are parsed and hashed entirely client-side using the Web Crypto API. Only MD5 hashes (which cannot be reversed back to emails) are optionally stored on our server when you use the code feature.

Removing someone from a specific mailing list only stops emails sent to that list. If they exist on other lists or are added back later, they might receive emails again. Adding someone to a suppression list acts as a global block, preventing emails from being sent to that address from any campaign using that suppression list, even if they are accidentally re-uploaded to an active mailing list.