Hey Scotty
Hope you are staying healthy!! Quick question. I have a ton of saved posts in my Instagram that I need to get on a Pinterest board. Insta gives me several options to save the pic to email or notes, etc, but not Pinterest. Is there a way to connect Pinterest or do I have to copy and paste each post to my pinterest board?
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While I don't know of a way to do a mass migration or pin many pictures at once from instagram over to Pinterest, Insta does give the ability to connect one pic at a time.

HOW TO PIN YOUR INSTAGRAM PICTURES TO PINTEREST | AndreaBolder.com | Biz Tips For Female Entrepreneurs

Also, check out this service. I don't know anything about it and have never used it, but seems like it might be what you're looking for:

Connect your Instagram to Pinterest with IFTTT