For the email you already wrote and now have to name

17 subject lines for the email you were about to send with one

Everything else in the email only counts if this one line earns the open.

Ask ChatGPT for subject lines and you get five variations on the one you already had, because it is guessing at the job from the words in front of it.

This runs the 17 formulas that make a line get opened, one line per formula, so what comes back disagrees with itself on purpose.

The formula that works precisely because everything around it in the inbox is trying so hard
Why a cold list opens for reasons a warm list ignores, and how to tell which one you are writing to
The anchor every line needs before it is allowed near a send button
Which formula to reach for when the email is genuinely bad news
The word-level triggers that move an open rate without touching the offer
Why the flat announcement beats the clever line more often than clever people enjoy hearing

I've spent eight years writing email that had to earn its open, including conversion copy for NordVPN, PandaDoc and OpusClip, and $45,000 in affiliate revenue in six months from a list with no social presence and no product.

Subject Line Writer Free

Paste an email and get 17 subject and preview pairs, each built on a different formula.

Your email body Audience (optional) Goal (optional)

Want to keep going?

That's your free run. Drop your email for three more a day. I'll also send you the installable prompt, so you can run this any time.

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Get the Subject Line Writer as a prompt you install once. It runs in Claude or ChatGPT, on any email, for as long as you send email.

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