How can I obfuscate an EXE file?

Question

I have an EXE file. It comes from a Qt C++ Visual Studio project. I would like to obfuscate this EXE. The main reason is that my URLs (for version files, API etc.) that I use in the program and any other strings can be easily edited with a HeX editor. Thanks for your help.

Answer 1

I used UPX packer and it works well.