Guides
ChatGPT Ad Image Size
The ChatGPT ad image size is 1200 x 1200 pixels in a square 1:1 format. Here is what you need to know.
Dimensions and format
The required image size for ChatGPT ads is 1200 x 1200 pixels. The format is square 1:1. Accepted file types are PNG and JPG.
The UI may scale the image down for display, but the source image should be 1200 x 1200 for best quality.
Why square format
The square format is designed for the conversational interface. It fits naturally within the chat flow and works well on both desktop and mobile.
Do not create landscape creatives as the primary ad asset. Always use square 1:1.