Jsan is a JavaScript Sanitizer. It serializes complex JavaScript objects, handling circular references and duplicate objects gracefully, which JSON.stringify can't. This allows for robust data serialization and deserialization, crucial for debugging, caching, and data storage. Jsan provides options for controlling the maximum depth and length of the serialized output, preventing potential performance issues with large or deeply nested objects. It's a powerful tool for handling intricate data structures in JavaScript environments.