how to dump file to hex format?

Yes, I tried to find a solution how to do it in the most easy way, and yes, it is very, very easy :). Use Powershell.

format-hex .\some-file-to-dump.txt
format-hex .\another.file.this.time.exe
format-hex .\just-transfer-output.to.default-stream.txt > some.new.file.txt