The single biggest factor affecting your open rates is the email subject line. If it gets cut off on mobile devices, your subscribers might ignore it completely.
Ideal Email Subject Lengths
- Desktop Display: Usually caps at 60 to 70 characters before showing an ellipsis (...).
- Mobile Display: Usually maxes out at 41 to 50 characters limits dependent on screen size.
- Preheader Text: Optimal length is between 40 to 130 characters.
To maximize visibility on all devices, we recommend keeping your main hook within the first 40 characters. Type your ideas here to see real-time char count tracking.
Private & Secure: All text processing is done client-side. We do not store or track your inputs.