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Copy & campaign builders
Subject Line Analyzer
Score length, word count, spam risk, and mobile truncation, then see how the line previews across common inbox clients.
All free toolsFree · nothing stored
Your subject line
Short, lowercase, and specific outperforms clever almost every time in cold outreach.
Score
100/100
Characters
0
Words
0
Personalised
No
Inbox previews
Gmail desktop
Gmail mobile
Outlook desktop
Apple Mail iPhone
What works in cold outreach
- • Three to five words. It should look like an internal email, not a campaign.
- • Lowercase reads more human than Title Case.
- • Never fake Re: or Fwd: - it is the fastest way to a spam complaint.
- • Reference something specific: their tool, their role, their city.
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