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SEO & Marketing
Cold Email Subject Line Tester
Analyze your cold email subject lines for length, spam triggers, and personalization. Preview exactly how your email will look on an iOS mobile lock screen.
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Mobile Lock-Screen Simulator
80% of cold emails are judged and deleted directly from a phone's lock screen. Use the simulator on the right to see exactly how your subject line and preview text will truncate on an iPhone before you hit send.
09:41
Monday, October 14
Mail
nowJohn Doe
Subject line will appear here
The first line of your email will appear here. It's just as important as the subject line.
Frequently Asked Questions
Why is the lock-screen preview important?+
80% of cold emails are read on mobile devices. If your subject line and preview text are too long, they will be cut off, ruining the hook.