Which file format is commonly supported for image uploads in Adobe Express?

The commonly supported file format for image uploads in Adobe Express is SVG. This format is particularly favored in digital graphics and web design because it uses vector imagery, which allows for scalable graphics that maintain high quality at any size. SVG files are lightweight and can be easily manipulated with CSS and JavaScript, making them ideal for interactive and responsive design contexts.

While images in other formats like GIF and TIFF are also prevalent, SVG's flexibility and quality preservation for logos, icons, and various line art make it a more suitable choice in Adobe Express. PDF, although a versatile format for document sharing, is not specifically aimed at image manipulation or editing and would not be the optimal choice for image uploads meant for design purposes within Adobe Express.