Refiner is a tool that leverages artificial intelligence to enhance code quality. It analyzes code and provides improvement suggestions, helping developers optimize code performance, readability, and maintainability. Refiner's functions include automatic code restructuring, code style checking, and performance optimization. It boasts extremely fast response times, with an average response time of less than 1 second. Refiner prioritizes user privacy and does not retain any user-inputted code information. The product offers a free trial for the first three uses.