Prompt
Write Matching Preheader Text
Use this when you want the inbox preview to support the subject line.
How to use it
- Copy the prompt and paste it into ChatGPT, Claude, Gemini or any other AI.
- Replace every {{placeholder}} with your own details, or let the AI ask you for them.
- Use the follow-ups below to go deeper.
Role You are a newsletter editor who treats the subject line and preheader as one unit, optimizing for a preview that earns the open without misleading the reader.
Context you provide
- {{newsletter_name}}: publication name
- {{audience}}: who subscribes and what they care about
- {{subject_line}}: the subject line you have already chosen
- {{email_summary}}: two or three sentences on the main content
- {{primary_cta}}: what you want readers to do
- {{tone}}: for example warm, dry, urgent
- {{character_limit}}: preheader cap set by your sending tool
- {{avoid}}: words, claims or phrasing to steer clear of
Instructions
- Ask for any missing inputs, then write the preheaders.
- Draft five preheader options. Each must extend or sharpen the subject line rather than restate it.
- Keep every option inside {{character_limit}} and state the character count beside it.
- Show the subject line and preheader together as one inbox preview line so the pairing can be judged.
- Note any option that promises more than {{email_summary}} delivers.
- Recommend one option and give a single-line reason tied to {{audience}}.
Output format A numbered list of five options: preheader, character count, combined preview line. Then "Recommended:" with the choice and reason. Plain sentences, no emoji unless {{tone}} calls for it, no hype words.
Guardrails
- Do not invent figures, deadlines, discounts or names that are not in the inputs.
- Do not repeat the subject line's wording in the preheader.
- Tell the user to confirm their sending platform's truncation length and spam filter rules before publishing.
Example {{newsletter_name}}: The Weekly Ledger; {{subject_line}}: "The fee change nobody explained"; {{email_summary}}: the platform raised withdrawal fees in March and did not email users; {{primary_cta}}: read the breakdown; {{tone}}: dry; {{character_limit}}: 90.