Email Subject Line Grader
Test your email subject lines before you send. Get instant feedback on length, spam triggers, personalization, and more.
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Frequently Asked Questions
What is a good email open rate?
Average email open rates vary by industry, but generally fall between 15-25%. Top performers achieve 30%+ open rates. A strong subject line is the biggest factor influencing whether your email gets opened.
How long should my email subject line be?
The ideal length is 30-50 characters, or roughly 6-10 words. This usually displays well on mobile devices, where many emails are read.
Do emojis in subject lines help?
Relevant emojis can help a subject line stand out, but they should match the audience and brand. For most businesses, one emoji is enough.
Why does personalization matter in subject lines?
Personalized subject lines can feel more relevant because they reference the recipient, their role, location, interest, or recent behavior.
How can I avoid spam filters?
Avoid spammy trigger words, excessive punctuation, all caps, and exaggerated claims. Use clear, conversational subject lines focused on the recipient value.
Should I use urgency in my subject lines?
Urgency can work when the deadline is real. False urgency may improve one campaign but hurts trust over time.
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