Yes, you can download a 7-day free trial of Photoshop. The free trial is the official, full version of the app. It includes all the features and updates in the latest version of Photoshop. Your trial will automatically convert to a paid Creative Cloud membership after 7 days, unless you cancel before then.
For a quick, easy, and free online photo editor, try Creative Cloud Express. The Creative Cloud Express free plan includes beautiful templates, fonts, and images you can use along with your own photos for social graphics, flyers, animations, collages, compositing, and more.