Email Suppression List Scrubber
Clean your mailing lists by comparing them against suppression lists using SHA-256 hashing. All processing happens in your browser — no email data is ever sent to a server.
Drag & drop a file here, or
Suppression List Source
Drag & drop a file here, or
How the Email Scrubber Works
Upload your suppression list (CSV) and your mailing list. The tool hashes all email addresses using SHA-256 directly in your browser, then compares the hashed values. Matching addresses are flagged as non-mailable.
You can also convert a suppression list into hashes and store them with an 8-character code. Share this code with partners so they can scrub their lists against yours without ever seeing the actual email addresses — perfect for privacy-compliant collaboration between networks and advertisers.
Why Scrub Your Email Lists?
Sending to suppressed addresses damages your sender reputation, increases bounce rates, and can trigger spam filters. In affiliate and partner marketing, maintaining clean lists is essential for deliverability and compliance with CAN-SPAM, GDPR, and other regulations.
This free tool handles suppression list scrubbing entirely client-side. Your email data never leaves your browser, making it safe for handling sensitive subscriber lists. Process thousands of addresses in seconds with no upload limits.
What is the Email Suppression List tool?
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.
How does the SHA-256 hashing work?
Email addresses are converted into irreversible SHA-256 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.
What is the 8-character code?
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.
Is this tool really free?
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.
Is my data safe?
Your email data never leaves your browser. CSV files are parsed and hashed entirely client-side using the Web Crypto API. Only SHA-256 hashes (which cannot be reversed back to emails) are optionally stored on our server when you use the code feature.
Need Enterprise-Level Email Compliance?
Integr8's tracking platform includes built-in suppression list management, automated compliance checks, and real-time fraud prevention for partner marketing campaigns.