We require two images for the product - the cover (header) image and a thumbnail.
The thumbnail is shown on your Gumroad store page and in Gumroad Discover (which is Gumroad’s internal marketplace). We’ll cover Discover in the next Part on marketing.
For the header image I’d recommend using Canva.
Head to Canva and create a new design. Choose custom size and enter 1280 width x 720 height:
Sadly there are no pre-built Canva templates for Gumroad.
However, if you click Create New Design then Canva will provide lots of templates that it those dimensions:
Scroll down the left hand side designs until you find something you like. Edit from there and upload as your product’s cover image.
For the thumbnail we need a square image of 600 × 600. Again we can use Canva or we can use https://ideogram.ai/
Ideogram is good for the thumbnail because it can (unlike most AI image makers) generate text inside an image.
Grab a free account from ideogram.ai and use this prompt structure:
"Product Name" text. Typography. [style details]
Make sure that the name of your product is in “ “.
Then add any style details you want at the end of the prompt.
This example use text = “Prompt Engineering 101” and then “Three dimensional lettering. Neon” for the [style].
Not bad.
If you can’t get the right results from Ideogram though then again use Canva.
Alternatively you can hire a designer from fiverr.com or a similar site.