Cold Email Subject Line Generator
Generate 10 high-converting email subject lines with AI-predicted open rates
Free AI subject line generator for cold outreach, follow-ups, and B2B sales emails. Test and optimize your email subject lines to boost open rates. Works for cold emails, newsletters, and re-engagement campaigns.
Generate Subject Lines
Subject Line Best Practices
Writing High-Performing Subject Lines
- ✓Keep it under 50 characters for mobile optimization
- ✓Use personalization tokens like first name or company
- ✓Create curiosity gaps that compel opens
- ✓Include numbers or specific data points
Testing and Optimization
- ✓A/B test 2-3 subject lines per campaign
- ✓Avoid spam triggers: FREE, URGENT, ALL CAPS
- ✓Test sending times (Tue-Thu mornings perform best)
- ✓Track open rates by subject line pattern over time
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