I have not used any time to read up on Ooordinoools (and tbh I don’t want to either because I don’t really care about NFTs), but IIUC the NFT data is written to the blockchain? If so, I should be able to fetch that data from my node using bitcoin-cli and write it to a file to view someones inscribed image.
Discussion
They're stored in the transaction script, but how to get them out with your own node is a little beyond me. This is probably a better place to start: https://docs.ordinals.com/inscriptions.html