Write subject lines that get opened. Score yours instantly and get actionable tips to improve your open rate.
Subject lines in this range show the highest open rates across all industries. Mobile screens cut off after ~40 chars.
Subject lines with numbers get 45% higher open rates. Use specific figures like "3 steps" or "27% increase".
Including {first_name} or {company} can boost open rates by 20-30%. Make readers feel it was written for them.
ALL CAPS, excessive punctuation (!!!), and words like "free", "guaranteed", "act now" hurt deliverability.