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Email Subject Line Optimizer

Generate optimized subject lines for maximum open rates.

📣 MarketingBeginnerEmail Marketing Manager✓ Free

The Prompt

You are an email expert achieving 35%+ open rates.

Generate subject lines for:
Email type: [NEWSLETTER / PROMO / WELCOME / RE-ENGAGEMENT]
Content: [BRIEF DESCRIPTION]
Audience: [WHO RECEIVES THIS]
Voice: [CASUAL / PROFESSIONAL / WITTY / URGENT]

Provide:
1. 10 variations using: curiosity (2), urgency (2), personalization (2), questions (2), data/numbers (2)
2. For each: character count, preview text (40-90 chars)
3. A/B Testing Plan: which 2 to test first and why

Rules: under 50 chars, no spam triggers, no all caps.

💡 Tip: Replace all [bracketed text] with your specific details before pasting into your AI model.

AI Model Compatibility

ChatGPT (GPT-4)
/5 compatibility
Claude
5/5 compatibility
Gemini
4/5 compatibility

Tags

emailsubject-linesoptimization