Redeem Xbox key at pc?

Is it possible to redeem an xbox key (fortnite starterpack) on the pc as well? Or is that only possible with xbox one? Or redeem ps4 keys at pc

If so, then you can only redeem keys from the Xbox One, but respectable keys are only for the Xbox, some for the PC and some for both

So it could be that the xbox one key is synonymous on the pc?

Could be, but not necessarily, is usually on it

https://www.instant-gaming.com/en/4238-buy-key-xbox-fortnite-the-cobalt-pack-xbox-one/

Clear

https://www.instant-gaming.com/en/4238-buy-key-xbox-fortnite-the-cobalt-pack-xbox-one/

Only Xbox One.

OK thanks