Compiling and executing web assembly modules can take up valuable time. This web app allows users to conveniently test their ideas with web assembly. Users can write code in the browser and then compile and run the code as a web assembly module. Although this isn't useful for developing a large scale web application, it can potentially speed up development by allowing users to test and optimize small portions of code. It makes sharing ideas easier as code can be shared and tested by anyone. WASM Fiddle allows users to compose C, C++ and Rust code in the browser and then compile and execute the code.