Online image editor supporting PSD, Sketch and XCF files (Photoshop, Sketch App and Gimp).
Photopea is a free online image editor, that runs without plugins. It can both read and save PSD files.
PP can work with layer styles, masks, smart objects, text layers and more.
Adjustments: Brightness, Contrast, Levels, Curves, Vibrance, Hue, Saturation.