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E-Commerce Email Subject Line & Open Rate Tester

Test your Klaviyo & Shopify email subject lines for deliverability, spam trigger words, mobile preview truncation, and predicted open rates.

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Predicted Open Rate Score
100/ 100

Excellent! High probability of standing out in crowded inboxes.

📱 Mobile Inbox View (iPhone / Gmail):

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⚠️ Subject might truncate on small screens

Deliverability & Conversion Factors:

Optimal Character Length (30–60 chars)✓ Ideal
Spam Trigger Words Detected✓ 0 Triggers
Emotional Hook or Emoji Usage✓ High CTR
Urgency / Scarcity Angle✓ Strong Urgency
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