Hello! I'm giving a very short tutorial on how to make an icon square (since I often saw many un-square icons). anda don't need Photoshop atau GIMP atau heavy picture editors. Here I'm using link
1. Click "Editor". Here you'll see a Photoshop-like layout.
2. Click "Open image from computer". Select your icon atau any picture anda want to make square.
3. Click on the "Crop" icon on the puncak, atas left of the panel. Choose "output size" on the "Constraint" dropdown. Enter 200 x 200 atau whatever square size anda want.
4. Drag the mouse over your picture. Hit Enter.
5. Don't forget to save your square picture!