subject line grader
Score your subject lines and get actionable feedback to improve open rates.
TL;DR
Subject Line Grader — Enter your email subject line to get a grade from A to F based on length, personalization, urgency, and spam triggers.
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Enter your email subject line to get a grade from A to F based on length, personalization, urgency, and spam triggers.
Write Subject Lines That Get Opened
Subject lines make or break email campaigns. The best subject lines are short, personalized, create curiosity, and avoid spam triggers.What Makes a Great Subject Line
Length. 6-10 words, under 60 characters. Short enough to display fully on mobile.Personalization. Names, company names, or specific details increase opens by 20-50%.
Curiosity. Questions or incomplete thoughts drive clicks without being clickbait.
Who Uses This
Cold emailers use it to maximize open rates. Marketing teams use it to A/B test subject lines. Sales reps use it to improve outreach.frequently asked questions
Short (6-10 words), personalized, clear value, no spam words. Questions and curiosity hooks work well.
Sparingly. One emoji can improve opens for some audiences, but multiple emojis look spammy.
Yes. Spam trigger words in subject lines significantly increase spam folder risk.
20-30% is good for cold email. 40-60% for warm email. Subject line is the biggest factor.
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