Email Subject Line Generator
Generate high-converting email subject lines for your waitlist campaigns. AI-powered suggestions optimized for open rates.
How to Write High-Converting Email Subject Lines
Your email subject line determines whether subscribers open your email or ignore it. With average open rates around 20%, optimizing subject lines is critical for waitlist success.
Subject Line Formulas That Work
- Curiosity Gap: "You won't believe what's inside..."
- Urgency: "Only 24 hours left to claim your spot"
- Personalization: "[Name], your exclusive invite is ready"
- Social Proof: "10,000 people are already using [Product]"
- Question: "Ready to 10x your productivity?"
- Number: "5 ways to improve your [outcome]"
Words That Increase Open Rates
Power words proven to boost engagement:
- Exclusive, Limited, Now, Today, New
- You, Your (personalization)
- Free, Save, Bonus
- Announcing, Introducing, Launching
- Secret, Private, Invitation-only
Words to Avoid (Spam Triggers)
- Free money, Cash, Prize
- Click here, Act now
- ALL CAPS or excessive !!!
- Buy, Purchase, Order now
- Guarantee, Risk-free
Optimal Subject Line Length
Mobile email clients display only 30-40 characters. Keep critical information at the beginning. Ideal length: 40-50 characters for maximum visibility.