Stanford Javascript Crypto Library (SJCL)

SJCL, or Stanford Javascript Crypto Library, is a high-level, open-source JavaScript cryptography library designed to provide secure and robust cryptographic primitives for web applications. While it was once a notable choice for client-side encryption, the library is officially deprecated by its maintainers. The current stable version is 1.0.9, but it has not seen significant feature development in many years, with recent updates primarily addressing critical vulnerabilities. Its release cadence is effectively stalled. Key differentiators at its prime included its focus on security best practices for in-browser cryptography and ease of use, but it is now advised against for new projects due to its age and the availability of more modern, actively maintained alternatives in the JavaScript crypto ecosystem.