How to Make AI Write Copy That Sounds Like You (and Sells)

You ask an AI tool for a homepage headline and get something smooth and forgettable. You ask for an email and it opens with a line you would never say. The copy is not wrong. It just sounds like everyone, because the tool has no idea how you sound and you did not tell it.

The fix is not a cleverer prompt. It is giving the tool three things it does not have: your voice, your reader, and a way to check the result. This guide shows how to set each one up.

Why AI copy sounds generic

When you give a tool a thin request, it fills the gaps with the most common choices. The most common choice for a headline is a big promise. The most common choice for an email opener is a friendly greeting and a line about how busy everyone is. Those defaults are the reason so much AI copy reads the same.

The cure is to take away the room for defaults. The more your request says about who you are and who you are talking to, the less the tool guesses.

Step 1: Write a one-page voice guide

You do not need a brand book. You need one page you can paste into any request. Fill in four parts:

How you talk. Three to five words, like "plain, warm, a little dry".

Words you use. A short list of phrases that sound like you.

Words you never use. The phrases that make you wince, such as "game-changing" or "unlock".

Sentence habits. Short or long, questions or statements, how you open and close.

The "never use" list is the most useful part. It stops the tool from falling back on the phrases that make copy sound written by a machine.

Step 2: Show it real examples

A description of your voice only goes so far. Examples go further. Paste in two or three things you wrote that you are proud of: an email to a customer, a page of your site, a message to a friend about your work. Then say: "Match the voice of these. Do not copy the content."

Pick examples that sound like you on a good day. A tool will copy whatever it is shown, flaws included.

Step 3: Name one reader

Copy for "everyone" is copy for no one. Before every request, write who you are talking to and what they want: "A freelance designer who is behind on invoices and wants it to be less awkward to chase them."

Then add the one thing you want them to do. One reader and one action make the copy sharper than any list of tone words.

Step 4: Ask for the work in small pieces

Do not ask for the whole page at once. Ask for five headline options, pick one, then ask for the opening paragraph, then the proof, then the call to action. Each piece gets checked against your voice guide before the next begins.

Small pieces also make it easy to see when the tool has drifted from your voice.

Step 5: Edit with a checklist

AI copy usually needs an edit, and a checklist keeps the edit quick:

Does it sound like something I would say out loud?

Is there a claim I cannot back up? Cut it or soften it.

Is there a phrase from my "never use" list?

Does the first line say something specific?

Is there exactly one thing I am asking the reader to do?

Read it aloud once. Anything you stumble over, rewrite.

Step 6: Keep a record of what works

When a piece comes out well, save the request that produced it. When a piece comes out flat, note what was missing. After a few rounds you have a set of requests that reliably sound like you, and the work gets faster each time.

Related reading: How to Make Your AI Check Its Own Work for a way to add a review step to every piece of copy.

If you want the method already built into your AI tool, VERTX's Copy and Conversion Pack installs the methodology that makes your AI copy sound like yours, and convert. See the Copy and Conversion Pack