Score your subject lines for length, spam triggers, engagement factors, and deliverability.
Enter a subject line to analyze
The best subject lines balance brevity, relevance, and intrigue. They're typically 30-50 characters, include personalization when possible, avoid spam triggers, and create curiosity without being clickbait. Questions, numbers, and modest personalization significantly boost open rates.
Our analyzer evaluates all these factors to give you an instant score and actionable recommendations to improve your cold email performance.
Get unlimited subject line analysis, A/B testing, and full campaign analytics with DitLead.
Start Free Trial