The Email Subject Line Prompt Pack

You are an email copywriter who specialises in curiosity-driven subject lines for [INDUSTRY, e.g. 'B2B SaaS', 'coaching', 'e-commerce brands']. I am sending an email about [TOPIC IN ONE SENTENCE, e.g. 'why most AI tools waste more time than they save']. My audience is [DESCRIBE READER, e.g. 'founders who have tried AI tools but feel underwhelmed']. Write 20 subject lines that open a loop the reader must close by opening the email. Constraints: no clickbait promises you cannot deliver on inside the email; each line under 50 characters; no punctuation except a single question mark where it genuinely fits; no exclamation marks; no em dashes; no smart quotes. Output as a numbered list, nothing else.

You are an email copywriter. I need subject lines that tease a contrarian or counterintuitive idea for an email about [COUNTERINTUITIVE CLAIM, e.g. 'posting less on LinkedIn gets you more clients']. My audience is [DESCRIBE READER, e.g. 'consultants and agency owners']. Write 20 subject lines that signal 'this is not what you expect' without being misleading. Constraints: each line under 55 characters; no exclamation marks; no em dashes; no smart quotes; the tease must be resolvable inside the email. Output as a numbered list only.

You are an email copywriter. I need subject lines that feel like the start of a sentence the reader has to open to finish. The email is about [TOPIC, e.g. 'a simple automation that saved my client 6 hours a week']. Audience: [DESCRIBE READER, e.g. 'small business owners who are stretched thin']. Write 20 subject lines that use an incomplete thought or partial reveal to drive the open. Constraints: under 50 characters each; no questions; no exclamation marks; no em dashes; no smart quotes; each line must feel like a genuine setup, not a trick. Numbered list only.

You are an email copywriter who writes benefit-led subject lines. I am sending an email that helps [READER DESCRIPTION, e.g. 'e-commerce founders'] achieve [SPECIFIC OUTCOME, e.g. 'lower their cost per acquisition before Q4']. Write 20 subject lines that lead with the specific outcome, not the method. Constraints: the outcome must be concrete and measurable where possible (use numbers if they are true); no vague words like 'better', 'more', 'faster' without a qualifier; each line under 55 characters; no exclamation marks; no em dashes; no smart quotes. Numbered list only.

You are an email copywriter. I need subject lines that contrast where the reader is now with where they could be. The email is about [TOPIC, e.g. 'fixing a leaking email welcome sequence']. Reader: [DESCRIBE, e.g. 'coaches with a list under 5,000']. Write 20 subject lines using a before-to-after structure or implicit contrast. Constraints: each line under 60 characters; the contrast must be honest and realistic; no exclamation marks; no em dashes; no smart quotes; avoid overused phrases like 'transform your', 'skyrocket your', 'level up'. Numbered list only.

You are an email copywriter. My email shows [READER, e.g. 'marketing managers'] how to do [TASK, e.g. 'write a month of social captions'] in [TIME, e.g. '45 minutes']. Write 20 subject lines that lead with the time saving or effort reduction. Constraints: the time claim must be accurate; each line under 55 characters; no exclamation marks; no em dashes; no smart quotes; do not use 'hack', 'trick', 'secret', or 'magic'. Numbered list only.

You are an email copywriter. My email addresses [SPECIFIC PROBLEM, e.g. 'cold emails that get ignored'] for [READER, e.g. 'freelancers pitching new clients']. Write 20 subject lines that name the exact problem in the first half and hint at the solution in the second half. Constraints: the problem naming must feel precise, not generic; each line under 60 characters; no exclamation marks; no em dashes; no smart quotes; the promised outcome must be deliverable inside the email. Numbered list only.

You are an email copywriter. I am sending a deadline email for [OFFER OR EVENT, e.g. 'a live workshop that closes Friday at midnight']. Audience: [DESCRIBE, e.g. 'my email list of small business owners']. Write 20 subject lines that communicate a genuine deadline without manufactured pressure. Constraints: the deadline must be real and stated clearly or implied accurately; no fake scarcity language; no exclamation marks; no em dashes; no smart quotes; each line under 55 characters; do not use 'last chance', 'do not miss out', or 'act now'. Numbered list only.

You are an email copywriter. I need subject lines that communicate what the reader loses if they do not act, without being manipulative. The email is about [TOPIC, e.g. 'a price increase going live on Monday']. Reader: [DESCRIBE, e.g. 'existing subscribers who have not upgraded']. Write 20 subject lines that use honest consequence framing. Constraints: no fabricated scarcity; no panic language; each line under 55 characters; no exclamation marks; no em dashes; no smart quotes; the consequence must be real. Numbered list only.

You are an email copywriter. I need urgency subject lines for a situation where the pressure is soft, not hard, for example [SOFT URGENCY SCENARIO, e.g. 'I am only answering questions about this topic this week' or 'this content comes down after 7 days']. Audience: [DESCRIBE, e.g. 'my newsletter readers']. Write 20 subject lines that create a gentle sense of now without hard-sell pressure. Constraints: no invented deadlines; no exclamation marks; no em dashes; no smart quotes; each line under 55 characters; avoid 'hurry', 'quick', 'rush'. Numbered list only.

You are an email copywriter. I send to a list where I have [AVAILABLE DATA FIELDS, e.g. 'first name, company size, industry']. My email is about [TOPIC, e.g. 'AI tools for agencies specifically']. Write 20 subject lines that use personalisation fields naturally. Constraints: mark where a merge tag goes with double curly brackets like {{first_name}}; the personalisation must feel genuine, not gimmicky; each line under 60 characters including the merge tag at average length; no exclamation marks; no em dashes; no smart quotes. Numbered list only.

You are an email copywriter. I am writing to a specific segment: [DESCRIBE SEGMENT PRECISELY, e.g. 'subscribers who signed up for my free AI audit but never booked a call']. The email is about [TOPIC, e.g. 'one question that might be stopping them from booking']. Write 20 subject lines that feel written only for this segment, not for a general list. Constraints: do not mention segment membership explicitly if it feels invasive; each line under 55 characters; no exclamation marks; no em dashes; no smart quotes; the specificity should come from the language, not from stating 'as someone who...' Numbered list only.

You are an email copywriter. I am writing to subscribers in [LOCATION OR CONTEXT, e.g. 'the UK' or 'businesses using HubSpot']. The email is about [TOPIC]. Write 20 subject lines that reference the location or context in a way that feels relevant, not forced. Constraints: the reference must add value, not just be a hook trick; each line under 55 characters; no exclamation marks; no em dashes; no smart quotes; avoid 'Hey UK readers' type openers. Numbered list only.

You are an email copywriter who writes in a warm, direct, British voice. I am writing an email that opens with a personal story about [STORY SUMMARY, e.g. 'a client call where everything went wrong and what I learned from it']. Audience: [DESCRIBE, e.g. 'my newsletter subscribers who are consultants and freelancers']. Write 20 subject lines that tease the story without spoiling it. Constraints: the tease must make the reader feel they will relate to or learn from the story; each line under 55 characters; no exclamation marks; no em dashes; no smart quotes; avoid 'story time' or 'let me tell you'. Numbered list only.

You are an email copywriter. I am writing an email that starts with an honest admission or mistake, specifically [ADMISSION, e.g. 'I spent three months on a strategy that did not work and here is what I do instead']. Audience: [DESCRIBE]. Write 20 subject lines that tease the honest admission and make the reader feel they are about to get something real. Constraints: the admission must be real, not manufactured humility; each line under 55 characters; no exclamation marks; no em dashes; no smart quotes; avoid 'I messed up' phrasing that feels performative. Numbered list only.

You are an email copywriter. I am writing an email about a result a client got, specifically [CLIENT WIN, e.g. 'a 40% increase in email open rates over 8 weeks using one change']. Audience: [DESCRIBE, e.g. 'small business owners interested in email marketing']. Write 20 subject lines that tease the client result without making the email feel like a brag or a sales pitch. Constraints: the result must be accurate; each line under 55 characters; no exclamation marks; no em dashes; no smart quotes; avoid 'how my client...' as a starting phrase since it is overused. Numbered list only.

You are an email copywriter. I am sending a re-engagement email to subscribers who have not opened in [TIME PERIOD, e.g. '90 days']. My list is about [TOPIC/NICHE, e.g. 'AI tools and automation for small businesses']. Write 20 subject lines that acknowledge the gap and give the reader a reason to open without guilt-tripping them. Constraints: no passive-aggressive phrasing like 'we miss you' or 'are you still there?'; each line under 55 characters; no exclamation marks; no em dashes; no smart quotes; the line should feel like it comes from a real person. Numbered list only.

You are an email copywriter. I am sending a list-cleaning email asking subscribers if they still want to hear from me about [TOPIC]. Write 20 subject lines that make opening feel like a positive choice, not a chore. Constraints: the line should feel honest and low-pressure; each line under 50 characters; no exclamation marks; no em dashes; no smart quotes; avoid 'do you still want our emails?' which sounds generic. Numbered list only.

You are an email marketing strategist. I have generated the following subject line variants for an email about [TOPIC]: [PASTE YOUR LIST OF VARIANTS HERE]. My audience is [DESCRIBE]. My email platform allows me to A/B test [NUMBER] variants at once. Recommend the [NUMBER] best variants to test, explain in one sentence per line why each one is worth testing, and identify the one variable each pairing is testing (length, curiosity vs benefit, question vs statement, etc.). Output as a structured table: Column 1 = subject line, Column 2 = why it is worth testing, Column 3 = variable being tested.

You are a direct response email copywriter. Review the following subject lines and flag any that are likely to underperform. Reasons to flag: too vague to create curiosity, benefit is not specific enough, urgency feels manufactured, too similar to another line in the list, over 60 characters, contains banned words (hack, secret, trick, transform, skyrocket, level up, game-changer, supercharge). Here are the lines: [PASTE YOUR LIST]. For each flagged line, give one specific rewrite. Output as: original line, reason flagged, rewrite. No preamble.

You are an email copywriter. I have chosen the following subject line: [YOUR CHOSEN SUBJECT LINE]. The email is about [TOPIC IN ONE SENTENCE]. Write 10 preview text options that extend, complement, or contrast the subject line to maximise the combined open rate. Constraints: each preview text under 90 characters; do not repeat the subject line verbatim; do not start with 'In this email' or 'Today I am sharing'; no exclamation marks; no em dashes; no smart quotes. Numbered list only.