https://www.remove.bg/
If you have Microsoft Office 2016 installed, you have another easy method to remove the backgrounds from images. The process is identical for Word, Excel, and PowerPoint.
Procedure
To get started, insert the picture into a document. Now choose Picture Format > Remove Background (in case of Mac). The app will then try to figure out the background, and mark them in purple. If the image is simple, it’ll easily cut out the background. For more complex images, use the Mark Areas to Keep and Mark Areas to Remove button to fine-tune the selection.
The marker is not intuitive to use. It just lets you draw straight lines around the object you want to keep or get rid off. Once you’re done, click the Keep Changes button to save the image.
