Email Subject Line Tester
Score your email subject lines and get actionable suggestions to improve open rates.
Test Your Subject Line
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Analysis
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Frequently Asked Questions
What is the ideal email subject line length?
30-50 characters (6-10 words) works best. Mobile shows 30-40 characters, desktop shows 60+. Front-load important words since the end may be cut off. Studies show subject lines under 50 characters have 12% higher open rates than longer ones.
Do emojis improve email open rates?
Emojis can increase open rates by 25-56% when used appropriately. They catch attention in crowded inboxes. But overuse feels spammy. Use 1 emoji max, place at the beginning or end, test with your audience, and ensure it renders across email clients.
What words should I avoid in subject lines?
Spam trigger words hurt deliverability: FREE, Act Now, Limited Time, Buy Now, Click Here, Winner, Congratulations, and excessive caps or punctuation (!!!). Instead of “FREE shipping”, try “Your order ships free”. Avoid ALL CAPS entirely.
How does personalization affect open rates?
Personalized subject lines (using first name, location, or past behavior) increase open rates by 26% on average. “[Name], your cart is waiting” outperforms generic alternatives. But avoid overusing - too much feels creepy. 1-2 personal elements is optimal.
What is a good email open rate for ecommerce?
Average ecommerce email open rates are 15-20%. Above 25% is excellent. Automated emails (abandoned cart, welcome series) typically see 40-50% open rates. Focus on improving relative performance - a 2% increase in open rate can significantly impact revenue.
