Email Subject Line Generator
Generate 15 high open-rate email subject lines for any campaign or newsletter. Covers every proven subject line formula — curiosity, urgency, benefit, personal, and more.
What makes a great email subject line?
The best email subject lines are specific, create curiosity or urgency, and are under 50 characters so they don't get cut off on mobile. Personalisation (using the reader's name or referencing their behaviour) consistently outperforms generic subject lines. Numbers and specific figures ("Save 37%" vs "Save more") also improve open rates significantly.
Avoid spam trigger words like "FREE!!!", excessive caps, and misleading subject lines — these hurt deliverability and damage trust.