What is InterPlanetary File System (IPFS)?
Crypto Glossary Definition
An open-source, peer-to-peer file system.
Why InterPlanetary File System (IPFS) Matters
IPFS is a decentralized file-storage protocol commonly used to host NFT images and metadata off-chain (since storing large files directly on a blockchain is prohibitively expensive), while still keeping a verifiable, content-addressed link to that file recorded on-chain.
InterPlanetary File System (IPFS) in Practice
Suppose an NFT collector buys a digital art piece and later wants to verify that what she owns is exactly what the artist originally created, rather than some image that could be quietly swapped out later. Because storing a full-resolution image file directly on a blockchain would be prohibitively expensive, the NFT's smart contract instead stores a link pointing to the artwork hosted on IPFS, a decentralized, peer-to-peer file storage network. Crucially, that link isn't a normal web address pointing to one specific server; it's a content-based identifier derived mathematically from the file's actual contents, so if even a single pixel of the image changed, the identifier itself would change too, making any substitution immediately detectable. The file also isn't sitting on one company's server that could go offline or get taken down; instead it can be hosted redundantly by many independent nodes across the network, sometimes 'pinned' by services the project pays specifically to keep the file available long-term. This gives the collector a way to independently verify her NFT's artwork matches exactly what was recorded at mint time, without needing to trust any single centralized image host to keep the file unchanged and permanently online, which is why IPFS became the default storage layer for most major NFT collections rather than a normal image URL.
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