Subject Line Tester
Evaluate your email subject line and get recommendations. Increase your open rate!
What is a subject line and why does it matter?
The subject line is the first thing a recipient sees in their inbox. It determines whether the email will be opened or ignored. Research shows that about 47% of recipients decide whether to open an email based solely on the subject line. Therefore, investing in a good subject line directly affects campaign results.
Good subject line principles
Effective subject lines are short (30-50 characters), specific, arousing curiosity or a sense of urgency, and clearly communicating the value of the email. Avoid all-caps, too many exclamation marks, and deceptive promises. Personalization (recipient's name or company name) can increase open rate by 10-20%.
Subject line testing
This tool evaluates your subject line based on length, emoji usage, presence of spam words, personalization, and other factors. Use the suggestions as a starting point, but always combine them with A/B testing in real conditions - your audience may react differently than average.