WebCrypto

WebCrypto provides a standardized JavaScript interface for performing hardware-accelerated cryptographic operations directly in the browser.

The Web Crypto API gives developers a native toolkit for high-stakes security tasks like hashing (SHA-256), signature verification (ECDSA), and encryption (AES-GCM). By leveraging the underlying operating system's cryptographic primitives, it eliminates the need for slow, insecure third-party JS libraries. It handles sensitive key material through the CryptoKey object, ensuring private keys remain non-extractable and isolated from the main execution thread. This is the industry standard for building secure end-to-end encrypted messaging, multi-factor authentication, and protected local storage.

https://developer.mozilla.org/en-US/docs/Web/API/Web_Crypto_API