You can do it in Photoshop fairly easily by selecting the bits you want using the lasso/pen tool and deleting the rest. You have to turn it into an adjustable layer first, rather than background, and you end up with a checkerboard effect around the bit you want, which basically means it is transparent. Then just save/export that, or even just copy paste it out into your doc.
If you don’t have photoshop I think you can download GIMP, which is similar but free.
Or you could post it up here for someone to do for you, and end up with a fourteen page thread of humorous Nazi gifs.
Is it from your own Coat of Arms?