Once the badge is downloaded, you will need to convert to a jpeg to use it in your email signature, LinkedIn profile, etc.
Open your PDF file in preview. Step 2: Select the page you want to convert to JPG, and go to File > Export… Step 3: A dialogue box will open. Under Format, select JPEG.
You can find other ways to convert here:
https://www.wikihow.com/Convert-PDF-to-JPEG