@hendione I didn’t go through a program when I did ours. I got the icons from the social media sites and then re-sized and updated the HTML linking for each button. I sized them all the same and had the links direct to the appropriate page matching the icon. If you are comfortable with this formatting it is what I would recommend. The icons were distributed in our Email Signature policy and varied based on location.
Hope this helps!

@hendione The only coding is adding the website link. Our signatures are in Outlook so i saved the image of the logo button and inserted the image and then resized and added the HTML link through the linking in Word. Then once they were complete with the signature template information I saved and put into Outlook. 

The other site that works well to put icons into signatures, @hendione is wisestamp.com.  But sometimes having more control by doing it yourself is also a good option!