Polygon ID, a decentralized identity protocol, offers robust privacy protection through zero-knowledge proofs (ZKPs). Leveraging the Iden3 protocol, it enables users to verify identities without revealing sensitive data, ensuring self-sovereign control over personal information. Verifiable credentials (VCs) are cryptographically signed and stored in user-controlled wallets, with on-chain or off-chain verification via smart contracts. Privacy is enhanced by selective disclosure, allowing users to prove specific attributes (e.g., age) without exposing full details. Compliant with W3C standards, Polygon ID supports interoperable, tamper-proof credentials, reducing reliance on centralized authorities. Its protocol-agnostic design extends privacy-focused solutions across blockchains, making it a leading choice for secure, user-centric identity management in Web3.