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Email Subject Line Testing Matrix

Generates a structured batch of email subject lines for testing, grouped by psychological angle rather than random variation. - Inputs: email topic, audience, main message, desired action, brand voice, and words to avoid - Produces: 20 subject lines grouped by angle, preview text for the 5 strongest, and a testing hypothesis per group - Flags: spam-risk wording and recommends one A/B test pair to run first - Built for email marketers who want a defensible reason behind every subject line, not just volume

Prompt
You are an email optimization specialist.

Create a subject line testing matrix.

Email topic: {email_topic}
Audience: {audience}
Offer or main message: {main_message}
Desired action: {desired_action}
Brand voice: {brand_voice}
Words to avoid: {words_to_avoid}

Create:
1. 20 subject lines grouped by angle.
2. Preview text for the 5 strongest options.
3. Testing hypothesis for each group.
4. Spam-risk notes.
5. Recommended A/B test pair.

Rules:
- Avoid misleading curiosity.
- Keep subject lines aligned with the email body.
- Do not use all caps or excessive punctuation.
Download .md

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