promptsforbusiness
Free AI prompt · ChatGPT · Claude · Gemini

Subject lines and preview text

Generates honest, curiosity-driven subject lines and matching preview text for your draft, sorted by style so you can pick or A/B test.

Task: writing newsletter subject lines and preview textBest in: ChatGPTFormat: single promptPack: Email newsletter in 20 minutes

What you'll fill in

  • [past subject lines] A few subject lines you have used before, with open rates if you know them (or "none") e.g. “November at Lumen (opened well); New classes + a tip (average)”

Copy the prompt

The prompt
Using the newsletter draft above, write subject lines and preview text.

Past subject lines for reference: [past subject lines]

Give me 12 subject lines, 3 in each style:
1. Straightforward (says exactly what is inside)
2. Curiosity (makes them want to open, but the email must deliver on it)
3. Benefit (what the reader gets)
4. Personal/conversational (sounds like a note from a friend)

Rules:
- Under 50 characters each; show the count in brackets.
- No ALL CAPS, no "RE:" or "FWD:" tricks, no misleading claims, maximum one emoji across the whole set of 12.
- Avoid words that read as spammy hype ("FREE!!!", "act now", "guaranteed").

Then, for my top 3 picks, write matching preview text (40-90 characters) that adds new information instead of repeating the subject line.

Finally, recommend one pair to A/B test against each other and tell me what we would learn from that test.

How to use it

  1. Open a new chat in ChatGPT (the others work too).
  2. Paste the prompt and replace every [bracket] with your details.
  3. Review the output, check any facts, and edit to taste.

Why ChatGPT: ChatGPT is fast at producing many short variations and sticking to character limits.

Tips

  • Preview text is free real estate. If you leave it blank, many inboxes show the first line of the email instead.
  • Test one difference at a time, like straightforward vs. curiosity, so you know what made the difference.
  • Keep a running list of subject lines and their open rates, and paste it in next time for better suggestions.

Example output

STRAIGHTFORWARD 1. New Sunday Restorative class starts Nov 2 [41] 2. Sunday class, Maya's back, and a hip tip [40] 3. Your November update from Lumen [31] CURIOSITY 4. Sundays just got softer [23] 5. The 5-breath fix for desk days [30] 6. Someone's back on the schedule [30] BENEFIT 7. A slower way to end your weekend [32] 8. Loosen up desk-tight hips in a minute [37] 9. Gift ideas that aren't another candle [37] PERSONAL 10. We made Sundays a little easier [31] 11. Quick note from the studio [26] 12. Saved you a bolster for Sunday [30] TOP 3 + PREVIEW TEXT - "Sundays just got softer" → "New Restorative class at 5pm, starting November 2." - "New Sunday Restorative class starts Nov 2" → "Plus: Maya's back and a hip stretch for desk days." - "We made Sundays a little easier" → "Slow, supported, small classes. Here's how to grab a spot." A/B TEST "Sundays just got softer" (curiosity) vs. "New Sunday Restorative class starts Nov 2" (straightforward). You'll learn whether your readers open more for intrigue or for clear news.

FAQ

Does this prompt work in ChatGPT, Claude and Gemini?

Yes. It is plain-language and written to work in all three. Best fit: ChatGPT. ChatGPT is fast at producing many short variations and sticking to character limits.

What do I need to fill in?

Replace each bracket with your own details: [past subject lines]. The more specific your input, the more useful the result.

Is this prompt free?

Yes. Copy it above and use it as often as you like. It is one of the free samples from the Email newsletter in 20 minutes pack.

Will I get the same result as the example?

No. The example was made for a fictional business to show the shape and quality of the output. Your result depends on your input and the model, so review and edit before you use it.

Do I need a paid AI plan?

Usually not. Free plans handle most prompts. Paid plans help when you paste in long documents or run a long multi-step sequence in one chat.

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