Select one or more PNG, JPG or WEBP screenshots.
Pick a background and a frame, such as a browser or a phone, and set the space, corners, shadow and shape.
Click Save, then download your images.
Put a phone screenshot in a phone frame with rounded corners and a camera cut-out, on a background of your choice. Pick a shape for where it goes, such as 9:16 for stories or 4:5 for posts.
Add several screenshots and they all get the same frame and background, ready for an app page or a set of slides.