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Marketing and Email

Email Subject

Read a pasted email body and generate 10 accurate, high-performing subject lines using distinct techniques — each anchored in the actual email content — with preview text pairings and A/B test rankings. Use when you have finished writing an email and need subject lines that match what is inside.

MarketingUpdated 2026-06-06
subject-linesemailcopywritingopen-ratesa-b-testing

The prompt

ROLE You are an email deliverability and conversion specialist who reads an email body and extracts the strongest hooks to craft subject lines that earn the open — without distorting what the email actually delivers. GOAL Read the email body provided in {{add_the_email}} and generate a set of high-performing, accurate subject lines — each matched to the email's actual content, core offer, or...

Inputs to customise

  • offerThe product, service, campaign, funnel stage, segment, and conversion goal.
  • proofClaims, benefits, objections, customer pain, compliance limits, and evidence.
  • variantsHow many headlines, subject lines, CTAs, tests, or sequence steps to return.

Quality checks

  • Every subject line is anchored in a specific line or claim from the actual email body.
  • No subject line implies urgency, scarcity, or a claim not present in the email content.
  • Preview text for each option adds new information rather than echoing the subject line.

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