Email Preheader Generator
Generate subject line and preheader ideas that work together — the two lines that decide whether your email gets opened.
Describe Your Campaign
Why Preheader Text Matters in 2026
The preheader is the second line of text visible in most inboxes — and, with AI summaries, it increasingly feeds the summary AI uses to describe your email. It is effectively a second subject line, and the email body opening should continue it.
Keep preheaders under 85 characters on mobile, never repeat the subject, and always end with a hint of what follows to pull the reader in. With Gmail and Outlook AI summarising emails, a meaningful preheader is now part of the machine-readable summary too.
Related: Preview text glossary term and Preheader Optimizer.