Struggling to write email subject lines that people actually open? You’re not alone. The subject line is the first impression of your email—and if it doesn’t catch attention in a crowded inbox, your email gets ignored. But what if you could generate high-converting subject lines in seconds?
With ChatGPT, you can.
This blog will give you 20 powerful, ready-to-use ChatGPT prompts to help you craft subject lines that drive clicks, boost open rates, and grab your readers’ attention.
Table of Contents
Why Email Subject Lines Matter
Before we dive into prompts, here’s a quick fact:
💡 47% of people open an email based on the subject line alone.
And if your subject doesn’t connect emotionally or promise value? It’s likely to be deleted or worse—marked as spam.
That’s why using AI tools like ChatGPT can be a game-changer. It gives you endless ideas, styles, and tones based on your audience and offer.
20 PROMPTS FOR HIGH OPEN RATES
1️⃣ Attention-Grabbing Subject Line
🗣️ Prompt: What are some attention-grabbing subject lines for an email about [product/service/industry]?
2️⃣ New Product Launch with Discount
🗣️ Prompt: We are launching [product]. It is designed for [audience]. These are three main features [feature 1], [feature 2], [feature 3]. Please write an email subject line inviting the reader to buy at [percentage]% off.
3️⃣ Personalized Subject Line for Your Sales Email
🗣️ Prompt: Here is a sales email I have written [insert your email]. Come up with a subject line that’s [funny/professional/emotional/etc.].
4️⃣ Re-engaging Inactive Subscribers
🗣️ Prompt: What are some effective subject lines for re-engaging inactive subscribers or customers?
5️⃣ Catchy & Clickable Ideas
🗣️ Prompt: How can I create catchy subject lines that encourage opens and clicks?
6️⃣ Short & Sweet Yet Powerful
🗣️ Prompt: How can I create subject lines that are both clear and intriguing, without being too long?
7️⃣ Personalization Magic
🗣️ Prompt: What are some ways to use personalization in subject lines to increase open rates?
8️⃣ Know Your Audience
🗣️ Prompt: How can I create subject lines that appeal to my target audience’s interests and needs?
9️⃣ Fear of Missing Out (FOMO)
🗣️ Prompt: Can you suggest some subject lines that incorporate the fear of missing out principle?
🔟 Humor in Subject Line
🗣️ Prompt: What are some ways to use humor or wit in email subject lines?
1️⃣1️⃣ Urgency-Driven Subject Line Ideas
🗣️ Prompt: Give me subject lines that create urgency using phrases like “last chance”, “ending soon”, or “final hours” for [product/service].
🔥 Use this when you want fast action from your reader!
1️⃣2️⃣ Seasonal or Festive Subject Lines
🗣️ Prompt: Suggest catchy email subject lines related to [festival/season] to promote [product/service].
🎉 Like: “This Diwali, Get 50% Brighter Deals!”
1️⃣3️⃣ Curiosity-Driven Subject Lines
🗣️ Prompt: Write subject lines that make the reader curious enough to open the email without giving away too much info.
🤔 Like: “This One Thing Doubled My Income in a Week!”
1️⃣4️⃣ Question-Based Subject Lines
🗣️ Prompt: Give me subject lines that start with questions to hook the reader’s attention about [topic].
❓ Like: “Still Struggling with Low Sales?”
1️⃣5️⃣ List Format Subject Lines
🗣️ Prompt: Write 5 subject lines that include numbered lists or tips for [audience/topic].
📌 Like: “Top 3 Tools You Need in 2025!”
1️⃣6️⃣ Emoji-Friendly Subject Lines
🗣️ Prompt: Create fun, modern subject lines that include relevant emojis for [email type].
📧 Like: “🚀 Ready to Skyrocket Your Business?”
1️⃣7️⃣ A/B Test Subject Line Suggestions
🗣️ Prompt: Give me two variations of this subject line for A/B testing: [insert your subject line].
🧪 Test what works best before blasting to your full list!
1️⃣8️⃣ Subject Lines for Abandoned Cart Emails
🗣️ Prompt: Suggest engaging subject lines to bring back customers who left items in their cart.
🛒 Like: “Hey! You Forgot Something…”
1️⃣9️⃣ VIP / Exclusive Offer Subject Lines
🗣️ Prompt: Write subject lines that make the reader feel special or part of an exclusive group for a limited offer.
👑 Like: “Just for You: 24-Hour VIP Access!”
2️⃣0️⃣ Testimonial or Social Proof Style Subject Lines
🗣️ Prompt: Give me subject lines based on customer success stories or testimonials to increase trust.
🗣️ Like: “How Priya Made ₹1 Lakh Using This Tool”
Pro Tips for Better Email Subject Lines
- ✅ Keep it under 50 characters
- ✅ Use personalization (e.g., include the subscriber’s name)
- ✅ Add power words (limited-time, free, new, secret, now)
- ✅ Try emojis (carefully) to make it pop
- ✅ Always A/B test for performance. Try two subject lines for the same email – observe which one performs better. Then, repeatedly apply that formula.
Conclusion
With these 20 ChatGPT prompts, you’ll never run out of creative ideas for writing subject lines that actually get opened. Whether you’re a marketer, freelancer, or business owner, these prompts can save time, boost performance, and increase revenue.
Now you have the full 20 unique and powerful ChatGPT prompts to create eye-catching, high-converting email subject lines — no repeats, no fluff.