✉️ 100+ ChatGPT Email Subject Line Prompts That Boost Open Rates Instantly

Are your email open rates stuck in the single digits? A high-performing subject line can make or break your email marketing campaign. That’s why we’ve curated 100+ ChatGPT prompts to help you generate subject lines that grab attention and drive clicks.

Whether you’re promoting a sale, sharing a newsletter, or launching a product — these full ChatGPT prompts will help you craft subject lines tailored to your audience, brand voice, and goals.

🔍 Why Email Subject Lines Matter

  • 📬 47% of users open emails based on subject line alone
  • 📉 Poor subject lines can land your emails in spam
  • 🔁 A/B testing begins with the right variations
  • 💡 ChatGPT makes brainstorming easy and effective

✅ How to Use These ChatGPT Prompts

Just paste these prompts into ChatGPT, fill in your brand or niche where needed, and watch the magic happen. You’ll get a wide range of engaging, click-worthy subject lines to test or use right away.

📌 100+ ChatGPT Prompts for High-Open Email Subject Lines

🔥 General Subject Line Prompts

  1. “Generate 10 engaging subject lines for a newsletter about [topic].”
  2. “Write 5 curiosity-driven subject lines for an email promoting a new [product/service].”
  3. “Give me catchy subject lines that create urgency for a 24-hour sale.”

🧲 Lead Magnet Subject Line Prompts

  1. “Create subject lines that offer a free ebook on [topic].”
  2. “Write 5 subject lines for a checklist opt-in related to [niche].”
  3. “Give me high-converting subject lines for a webinar registration email.”

🛍️ Sales & Promo Subject Line Prompts

  1. “Write 10 subject lines promoting a 50% off sale on [type of product].”
  2. “Generate 5 FOMO-based subject lines for a flash sale.”
  3. “Create clever subject lines for a product launch in the beauty industry.”

🎯 Targeted Industry Subject Line Prompts

Ecommerce

  1. “Give me subject lines that tease a new fashion drop.”
  2. “Write promotional subject lines for a handmade jewelry store.”

SaaS

  1. “Generate subject lines for announcing a new software feature.”
  2. “Create urgency-based subject lines for a limited-time SaaS deal.”

Coaching

  1. “Suggest empowering subject lines for a life coach email series.”
  2. “Write subject lines that inspire action for a mindset coaching program.”

🧪 A/B Testing Prompts

  1. “Give me 5 formal vs. casual subject line variations for a product promo email.”
  2. “Create subject line options with emojis and without — for a summer sale email.”
  3. “Generate subject line alternatives that highlight benefits vs. features.”

🎁 Holiday & Seasonal Subject Line Prompts

  1. “Write holiday-themed subject lines for a Christmas sales campaign.”
  2. “Generate New Year email subject lines that inspire transformation.”
  3. “Give me Halloween subject lines that are spooky and playful.”

🧡 Storytelling & Personal Subject Line Prompts

  1. “Create subject lines that start with a story hook for a relationship advice email.”
  2. “Write personal-style subject lines for a solo business owner’s newsletter.”
  3. “Generate subject lines that sound like a message from a friend.”

👀 Curiosity & Clickbait Subject Line Prompts

  1. “Write curiosity-driven subject lines that don’t give away the full message.”
  2. “Generate cliffhanger-style subject lines to increase open rates.”
  3. “Create subject lines that tease a shocking stat or fun fact.”

💬 Question-Based Subject Line Prompts

  1. “Write subject lines in the form of a question that addresses [pain point].”
  2. “Generate question-style subject lines for a personal development brand.”
  3. “Create subject lines with questions that spark curiosity about a product.”

😲 Emotional Trigger Subject Line Prompts

  1. “Write subject lines that use urgency and fear of missing out (FOMO).”
  2. “Generate subject lines that inspire hope or relief for people struggling with [problem].”
  3. “Create subject lines using emotional power words related to [topic].”

👋 Welcome Series Subject Line Prompts

  1. “Write a welcome email subject line for a new subscriber to a [fashion brand] list.”
  2. “Create 3 subject lines for a welcome sequence that builds trust.”
  3. “Suggest warm and friendly subject lines for new subscribers to an email course.”

🤖 Behavioral-Based Email Prompts

  1. “Create subject lines based on user who abandoned their cart with [item].”
  2. “Write a reactivation email subject line for someone who hasn’t opened in 60 days.”
  3. “Generate subject lines for a customer who recently purchased a [product].”

🧠 Niche-Specific Subject Line Prompts

Health & Fitness

  1. “Write subject lines that promote a fitness challenge or workout plan.”

Finance

  1. “Generate subject lines for a free budgeting template download.”

Travel

  1. “Create subject lines for an email promoting a last-minute travel deal.”

🏆 High-Converting Style Prompts

  1. “Suggest subject lines using numbers and lists (e.g. ‘7 Ways to…’).”
  2. “Generate subject lines that start with ‘How to…’ for [solution].”
  3. “Write subject lines that create contrast: ‘Before vs. After’ style.”

🧵 Email Thread Subject Line Prompts

  1. “Write subject lines that look like a reply or forward (e.g. ‘Re: Our last convo…’).”
  2. “Create subject lines that mimic a personal thread for higher open rates.”

🧑‍💻 B2B Email Subject Line Prompts

  1. “Generate subject lines that pitch a demo to business decision-makers.”
  2. “Write email subject lines targeting HR managers for a SaaS tool.”

🧮 Educational & Tips-Based Subject Line Prompts

  1. “Write subject lines for emails sharing expert tips in [niche].”
  2. “Generate subject lines that promote a free mini-course or training.”
  3. “Create subject lines that promote blog posts with actionable tips.”

🗓️ Weekly & Monthly Newsletter Prompts

  1. “Write consistent subject lines for a weekly digest in the [tech/startup] niche.”
  2. “Generate clever monthly update subject lines for a wellness brand.”
  3. “Create a playful ‘this week in [topic]’ subject line prompt.”

Want the rest of the list? I can continue with prompts #56–#100+, including:

  • Flash sale subjects
  • Loyalty campaigns
  • Event invites
  • User behavior-based email ideas
  • Emotional tone tuning
  • Emoji test prompts
  • Re-engagement subject lines

🚀 Pro Tips for Better Open Rates

  • Use power words like “Free,” “Exclusive,” “Last Chance,” “Secret,” etc.
  • Personalize with names or locations
  • Keep it under 50 characters when possible
  • A/B test frequently with variations from these prompts

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