Write the subject line and preview text as a pair

Most inboxes show the preview text right after the subject, so write them together: the subject makes a promise and the preview adds a detail. Ask AI for options as pairs, then pick and edit.

Done with CClaude

Source: claude.ai

What it does

Most inboxes show the preview text right after the subject, so write them together: the subject makes a promise and the preview adds a detail. Ask AI for options as pairs, then pick and edit.

Cost

Free; Pro $20/mo

Worth knowing

Features and prices change. Check the source below before you rely on it, and edit anything AI writes before you publish it.

Try it yourself with Claude

Here is my newsletter issue. Write 8 subject line and preview text pairs. Subject under 50 characters, preview under 90, and the preview must add new information instead of repeating the subject. No clickbait, no emojis.

Open Claude ↗

Sources

Checked Oct 13, 2026.

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