AI t-shirt prompt generator: a print-ready prompt in a few taps
Type what should be on the shirt, tap a style, a mood and colors, and copy a prompt made for printing.
Tap a chosen tag again to turn it off.
Type what should be on the shirt, and the prompt appears here.
Works in Midjourney, ChatGPT, Flux, Ideogram and other image AIs. Make it on a shirt opens SlapMake’s 3-step maker with your words filled in; making the picture there needs an account and uses credits.
How to use the prompt generator
- 1Say what is on itOne subject, as plainly as you would tell a friend: “a fox playing an electric guitar”. Surprise me fills in an idea to start from.
- 2Tap a style, a mood and colorsOne of each at most. The print tags (centered, plain background, no text) are on from the start, because they make a picture that is easy to print.
- 3Copy it, or make it hereCopy the prompt into any image AI, or press Make it on a shirt to open the 3-step maker with it filled in.
What goes into a good merch prompt
| Part | Example | Why |
|---|---|---|
| Subject | a fox playing an electric guitar | Image models follow what comes first most closely. |
| Style | retro circular badge, vintage outdoor patch style | One style gives one look; two styles fight each other. |
| Mood | bold and powerful | Steers faces, poses and light without more words. |
| Colors | limited palette of three colors | Fewer colors look bolder on fabric and cut out cleaner. |
| For printing | isolated on a plain white background, no text | Easy to cut out, and no misspelled words in the picture. |
From prompt to print
An AI picture is rarely print-ready as it comes. Take the white background away with the background remover, then run the PNG through the transparent PNG checker, which cleans faint leftovers and pale edges that would show on a dark shirt.
Add any words in the studio afterwards: the lettering is then sharp and spelled right, and you can change it any time.
Read more on the blog
- How to design and print your own merch with SlapMake
- Best DPI and Upscaling Settings for Midjourney and AI T-Shirt Prints
- How to Fix White Halos Around Transparent PNGs on Dark Hoodies
Questions people ask
What makes a good AI prompt for a t-shirt?
Say what is on it first, then one style, a mood and a few colors. Ask for a plain background and no text: the design is then easy to cut out and prints cleanly. A long list of styles pulls the picture in different directions, so pick one.
Why does it add no text?
Image AIs still often misspell words and invent letters. Leave words out of the picture and add them afterwards in the studio, where the lettering is sharp, spelled right and easy to move.
Which AI tools does it work with?
Any that takes a text prompt: Midjourney, ChatGPT, Flux, Ideogram, Stable Diffusion and others. Or press Make it on a shirt to make the picture with SlapMake and order it printed in three steps.
How do I get a transparent background?
Keep Plain background on, so the AI draws the design on white. Then take the white away with the free background remover and check the result with the transparent PNG checker, which also fixes pale edges.
Is it free?
Yes. Building and copying prompts is free, with no sign-up. Making the picture on SlapMake needs an account and uses credits; in another AI tool, that tool’s own prices apply.
Is an AI picture big enough to print?
Most AI pictures are about 1024 pixels across, sharp at about 3.4 inches: a sticker, not a shirt front. A full front at 300 DPI needs about 4500 × 5400 pixels; the print size calculator says how far a picture has to be enlarged, and the upscaler does it.
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