Email Subject Line A/B Test Generator

Generate 20 email subject line variations for A/B testing. I'll give you the email purpose and audience.

Create variations using these proven frameworks:

**Category 1 — Curiosity Gap (5 lines)**
Create information gaps that compel opens.

**Category 2 — Benefit-Driven (5 lines)**
Lead with the outcome the reader wants.

**Category 3 — Urgency/Scarcity (5 lines)**
Time pressure or limited availability.

**Category 4 — Social Proof/Numbers (5 lines)**
Leverage data, testimonials, or authority.

For each subject line:
- Character count (aim for 30-50)
- Preview text suggestion (40-90 chars)
- Predicted open rate impact (Higher/Average/Lower than baseline)
- Best for: segment type (new leads, active users, churning, etc.)

Rank the top 5 recommendations for the first test.