Email subject line generator
Write subject lines that get opened—without sounding spammy. This tool generates a clean prompt you can paste into Rex Squad (or any LLM).
Inputs
Your prompt
Paste this into Rex Squad (or any LLM) to generate subject lines that don’t feel like marketing sludge.
Write 20 subject lines for an email about Rex Squad. Audience: <who will receive this email?> Email type: sales follow-up Context: <paste key details, offer, and any constraints> Tone: human, concise, curious Requirements: - 3–6 words each (max 50 characters) - No spammy words (free!!!, act now, guarantee, etc.) - Avoid clickbait; be specific - Mix styles: benefit-driven, curiosity, direct, social proof, question - Do not use emojis Output format: 1) ... 2) ... ...
Pro tip
Give the model one real example subject line you like (and one you hate). It will match your voice much better.
Want this automated?
Rex Squad is building “AI employees” that draft emails using your real context (CRM, notes, past threads) — and keep a simple follow-up list so nothing slips.