Free email marketing tools
No signup, no tracking of what you type. Each tool explains how it works so you can trust the result.
- Email Marketing ROI Calculator
Estimate revenue, profit, ROI and the break-even point for any campaign.
- Email Subject Line Preview
See roughly where phones and desktop inboxes cut off your subject and preview text.
- Newsletter UTM Builder
Build clean, correctly encoded tracking links — one at a time or a whole newsletter at once.
- Email List Growth Calculator
Simulate subscriber growth from signups and unsubscribe rate.
- Email Open Rate Calculator
Calculate open rate and learn why opens are an imperfect signal.
SPF Record Syntax Checker Coming soon
Check the syntax of an SPF TXT record and count DNS-lookup mechanisms.