Holders.at is an NFT tool made by Jack Quack that allows users to copy wallet addresses holding NFTs from the chosen collection, export them, or share them as a link.  Using Holders.at, NFT developers can take snapshots of all NFT holder wallets in any collection on Polygon and Ethereum. Even beginner NFT developers can gather wallet addresses holding their own or other popular NFTs without using code. Developers can then target these wallets for airdropping their NFTs or creating white lists.