I have successfully downloaded the binary file from the online compiler. But my project was made on mbed studio and I also can’t find a way to upload the project into the online compiler.
after successful compilation the .bin file is in the BUILD folder.
For example… Mbed Programs\YOUR_PROJECT_NAME\BUILD\YOUR_TARGET\ARMC6\your_project_name.bin
When you want switching between the Online Compiler and the MbedStudio you will probably need to know something about source control.
If you want to switch from the MbedStudio to the Online Compiler only for one time. Just make a new project and drag & drop files (No folders only files like - main.cpp,mbed_app.json, .cpp and .h files of your libraries ) of your project from Windows File Explorer to the folder of the project in the Online Compiler.