Email Subject Line Tester
Enter your email campaign subject line below to get an instant score with a full report.
We also offer an embeddable API plan for SaaS application owners.
Subject Line Audit
Review the audit points below for your subject line.
How easy your subject line is to read and understand at a glance
Complexity of language used - simpler is often better for email
Character and word count optimization for different email clients
Overall emotional tone and how it might be perceived
Detection of words that might trigger spam filters
Words that might cause emails to land in promotions, updates, or socials tab
Detection of excessive financial and currency-related content
Analysis of numbers and special characters that may appear spammy
Checks for potentially misleading reply/forward indicators
Multiple exclamation marks or question marks detected
Words in ALL CAPS that might appear as shouting
Detection of merge tags or personal pronouns (you, your, etc.)
Strategic use of questions to engage recipients
Appropriate use of emojis for your audience
Checks if entire subject line lacks proper capitalization
Variety of words used to avoid repetitive messaging
Integrate Our Email Spam Subject Line Checker
Are you a SaaS owner or website developer? Embed our powerful Email Spam Subject Line Checker directly into your application. Get up and running in 5 minutes with automated setup.