Multibase

Multibase is a self-describing base encoding from the IPFS/libp2p ecosystem. A single prefix character identifies the encoding used: f = base16, b = base32, z = base58btc, m = base64, u = base64url. Decoding auto-detects the base from the prefix. Used in IPFS CIDs, AT Protocol (Bluesky), and libp2p.