How to Use the Email Subject Length Checker
Type your email subject to instantly see how it will appear on mobile (~40 chars) and desktop (~60 chars) screens. Truncated portions are shown with "..." so you know exactly what recipients will see before opening your email.
Email Subject Best Practices
- Mobile-optimized: keep under 40 characters
- Both mobile and desktop: aim for 41-50 characters
- Place the most important keywords at the start
- Use curiosity or urgency to increase open rates
Frequently Asked Questions
What is the ideal email subject length?
41 to 50 characters is generally optimal. Mobile shows about 30 to 40 characters, while desktop clients show up to 60 before truncating.
Do mobile and desktop cut off at different lengths?
Yes. Mobile email apps typically show 30 to 40 characters; desktop clients around 60. Exact cutoffs vary by app and screen size.
Do emojis count toward the character limit?
Yes, emojis typically take 2 characters. Some email clients may not render them, so keep important information in the text itself.