AI · Email Subject Optimizer
Subjects with better open rate.
Email Subject Optimizer
16 subject lines optimized to open. Keep under 60 characters for mobile.
What I discovered about email marketing surprised me
52friend, quick question about email marketing
44Today only: boost sales with email marketing
44Closes in 24h: email marketing
305 things that will change your view of email marketing
547 email marketing mistakes losing you money
43friend, I have something for you about email marketing
54friend, have you tried this with email marketing?
49double conversion with email marketing? Yes, like this:
55Still struggling with email marketing?
38Just launched: email marketing
30New in email marketing: automate everything
43The email marketing trick nobody uses
37How to save 10h/wk with email marketing in 5 min
48Why almost no one can boost sales with email marketing
54What your competition is already doing with email marketing
59How this tool works
Email open rate lives and dies by the subject line. A great subject can hit 40-60% open; a mediocre one sinks to 15-20%. Subject lines that win in 2026 have 3 traits: (1) under 60 chars (for mobile), (2) personalized with name, (3) promise specific value, not generic.
This generator produces 16 subjects in 8 tones: curiosity ('What I discovered surprised me'), urgency ('Today only'), number ('5 things...'), personal ('{name}, I have something for you'), question, announcement, tip, controversial, FOMO. Each with length indicator and under-60-chars validation.
Frequently asked questions
- What open rate is good?
- Industry average: 20-25%. Creator newsletter: 30-40%. Transactional email (purchase, password): 70-90%. If below 15%, serious problem (bad subject or burned list).
- Does name personalization help?
- Yes, +14% open rate on average. But if you don't have reliable first_name per subscriber, do NOT use the merge tag — visible '{{first_name}}' is worse than no name.
- Emojis in subject?
- Boost visibility in cluttered inboxes (+15% open in B2C). In B2B (LinkedIn audience): careful, can look unprofessional. A/B test always.
- What about preheader text?
- Critical. It's the line under the subject in mobile inbox. Treat as 'subject 2.0' — don't leave auto-generated from first paragraph. That's your second hook.