SJCL

SJCL is a compact, high-performance JavaScript library for industry-standard AES, SHA-256, and ECC cryptography.

Stanford University researchers developed the Stanford JavaScript Crypto Library (SJCL) to provide a secure, efficient toolkit for browser-based encryption. It implements NIST-approved algorithms (AES-128, 192, 256) and utilizes CCM mode for authenticated encryption to prevent padding oracle attacks. The library is designed for minimal footprint and maximum speed, making it a reliable choice for projects requiring client-side data protection without heavy dependencies.

https://bitwiseshiftleft.github.io/sjcl/