The Cardano Serialization Lib is a Rust‑based library that implements the binary format used by Cardano’s Alonzo ledger, providing fast serialization, deserialization and helper utilities for all core data structures (addresses, transactions, metadata, etc.). It is packaged for multiple platforms—Rust crates, Node.js and browser WebAssembly (with optional GC support) and React‑Native bindings—so developers building wallets, dApps, or other Cardano tooling can conveniently work with Cardano data in a safe, high‑performance way.