This is a great online web alternative to Photoshop or Gimp… If you own a Chromebook, Photopea may be the image editor you are looking for.
Photopea is an advanced image editor, which can work with both raster and vector graphics. You can use it for simple tasks, such as resizing images, as well as complex tasks, such as designing webpages, creating illustrations, processing photographs and more.
Open and edit PSD, XCF, Sketch (Photoshop, Gimp and Sketch) or any other image files. Inspect PSD and Sketch files. Convert Sketch to PSD. Apply photo effects and filters. A perfect alternative to Photoshop or Gimp.
Source: Photopea | Online Photo Editor