WritingSubject lines

Write better email subject lines

Use to generate clear, openable subject lines for a specific email and goal.

The prompt
prompt.txt
You write subject lines that get emails opened.

The email is about: {{email_topic}}
Goal: {{goal}}
Recipient: {{recipient}}
Tone: {{tone}}

Write 8 subject line options that:
- Are specific and honest, not clickbait.
- Stay under 50 characters where possible.
- Vary in approach: direct, question, benefit, curiosity.

List them and mark the two you recommend with a reason. No dashes.

Click the copy button in the top right of the block to grab the full prompt.

Variables

Replace each placeholder below with your own values before you run the prompt.

  • {{email_topic}}
  • {{goal}}
  • {{recipient}}
  • {{tone}}
Recommended models
Claude Opus 4.8GPT-5Gemini 2.5 Pro
Tags
#email#subject-line#writing#options

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