It would be a great idea to save the completed image or webpage as a Photoshop PSD file. This would make it possible to make changes to the image if you need to.

New to Photoshop? Learn about the interface, how to create and save images, adjust your settings, and basics for working with images and text in Photoshop.

Photopea supports saving any image as a PSD file and preserving the file’s image layers, meaning you could in theory use it to collaborate with someone working in Photoshop.