AI product poster generator for sales and launches

Decide the words before the picture

Most weak posters are weak because of the copy, not the image: too many lines, a discount that needs a footnote to be true, a headline that says nothing (“Big Sale!”). Write the words first and cut them down to three pieces, a headline, the offer and a call to action. Everything added after that gets smaller, and small text is where AI-rendered lettering is most likely to slip.

Type numbers exactly as they should appear, such as “20% OFF”, “$29” or “Ends Sunday”, and put them in quotes in your request. Don’t ask the model to work anything out. “A third off” might come back as 33%, 30% or something else entirely.

What our text tests showed

On our GPT Image 2 prompt page we built a six-image Amazon listing set for a fictional kettle, with headlines, specs and a two-column table. Every word we put in quotes came back spelled correctly, degree signs and ranges included. The problem we did see was an addition: one icon picked up a label nobody had asked for.

That is the pattern to proofread for. Read every word on the poster, then look for words that shouldn’t be there at all, such as an invented tagline, a second price or a badge. If the wording has to be exact, as with a legal line or a long product name, ask for an empty area and set the text yourself in a design tool.

Three hot sauces, one bundle poster

Say you sell hot sauce and want a 4:5 poster for a three-bottle bundle. Upload a photo of the three bottles together, or one clear photo of each, plus your logo. Then describe the layout the way you would brief a designer: “Three bottles standing in a row on the right, slightly overlapping. Headline top left: ‘The Heat Trio’. Under it, in a red badge: ‘3 for $30’. Small line at the bottom: ‘Free shipping over $40’. Dark slate background, warm side light.”

When it comes back, check the bottles first. Are the labels yours, are the caps the right colour, are there three and not four? Then the words, one at a time. Then shrink it to thumbnail size, the way it will appear in a feed. If the badge is the first thing you notice, the layout works. If the background is, simplify it.

If the poster will run as an ad, make a second version that changes only the offer line, with “Free shipping on the trio” in place of “3 for $30”. Two posters that differ in one thing tell you which offer people respond to. Two that differ in everything tell you nothing.

Layout instructions the model can follow

“Make it pop” gives the model nothing to do. Positions, sizes and colours do: “product on the right, headline top left, offer in a yellow badge under the headline”. Name one background and keep it plain; the product and the offer should be the two brightest things on the poster. For a campaign, write the layout once and reuse it, changing only the offer and the product, and a set of posters will look like one brand.

Choose the shape for the placement before you start. A 4:5 poster fills the most room in an Instagram or Facebook feed, 9:16 suits stories, and a wide banner needs its text kept away from the edges, because many store themes crop banners on phones.

Printing it, or putting it in motion

For print, generate at the highest resolution available and check the edges and small text at full size before the file goes anywhere. Ask your printer what size and bleed they need; a poster made for a phone screen often needs a margin added around it. The larger the print, the more the lettering will show its flaws.

A finished poster can also become a video. Upload it on the video side and Blurbly can offer a Motion poster: a 5-second vertical clip in which the picture moves, the camera pushes in on the price, and your printed words stay as they are. That gives a static sale a version for Reels and Stories without redrawing anything.