Test your subject line
See how much of it shows on a phone, and what might hurt opens or replies.
Checked in your browser. Nothing is sent or saved.
On a phone
Quick question about {{company}}
On a desktop inbox
Quick question about {{company}}
- Good: 32 characters: fits on most phones.
- Good: 4 words.
- Good: Personalised with a variable: each lead sees their own name or company.
- Good: No common spam words or patterns.
Part of A/Z testing in Inboxed. Up to five versions per step, sent evenly, with the winner picked by reply rate.
See A/Z testingStart freeQuestions
How long should a cold email subject be?
Short. Phones show roughly the first 35 to 40 characters, so put the words that matter first. Two to seven words is typical for cold emails that get replies.
Should I use Re: to get more opens?
No. Faking a reply misleads the reader and breaks trust, and Inboxed blocks it on first emails.
Is my subject line stored?
No. The check runs in your browser and nothing is sent to us.
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