Email Subject Line Length Calculator
Analyze Email Subject Line Length
Subject Line
0 characters
Preheader Text (Optional)
0 characters
Subject Length: Optimal subject lines are 20-50 characters. Mobile devices show 35-40 chars, desktop shows 60-70. Keep important words at the beginning!
Key Features
Length analysis
Preview simulation
Device testing
Truncation warning
Character counting
Use Cases
1
Subject optimization2
Preview testing3
Mobile optimization4
Character limitsTool Info
Typecalculator
Free
Yes
Signup
Not Required
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About Email Subject Line Length Calculator
The Email Subject Line Length Calculator shows how your subject line displays across different devices, clients, and preview scenarios.
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