Free Subject Line Grader

A good email subject line is concise (30-50 characters), creates urgency or curiosity, avoids spam words, includes personalization when possible, and clearly indicates the email's value proposition.

Our AI analyzes your subject line against proven e-commerce best practices including length, urgency, clarity, personalization, emotional appeal, and spam-trigger avoidance to provide a score from 0-100.

The optimal length is 30-50 characters (6-10 words). This ensures your subject line displays fully on mobile devices and doesn't get truncated in most email clients.

Emojis can increase open rates when used sparingly and appropriately for your brand. Test them with your audience, but avoid overuse as it can appear unprofessional or trigger spam filters.

Avoid excessive capitalization, multiple exclamation marks, spam trigger words like 'FREE!!!', 'URGENT', or 'LIMITED TIME'. Keep your language natural and focus on value rather than hype.

A/B test subject lines regularly, especially for important campaigns. Test one element at a time (length, urgency, personalization) and use the insights to improve future campaigns.