The simplest and best site I've used is photoimage

It is sooo easy.

The picture must be in your picture file first, so copy the picture and save it in your picture file.

Then....

1. Go to POSTIMAGE https://postimages.org/
2. Click on "Choose Image"
3. Open your picture file
4. Double Click on the picture
5. A new page will open on postimage
6. Copy the "Direct Link"
7. Paste the direct Link in your email, post, whatever.

There you have it, done!