Can I hex edit a file in Visual Studio?

In addition to Kevin's answer, with Visual Studio 2017 you need to have the Visual Studio C++ Core Features component installed.

Source

Another way to do it is to rename your file to .bin and drag it into VS editor

1. Menu File → Open → File
2. Select the file to be opened
3. On the open file dialog at the bottom there is a down arrow on the "Open" button
4. Click "Open With..."
5. Click "Binary Editor"
6. Click OK

Or for the keyboard geeks out there:

1. Ctrl + o
2. Ctrl + v (paste filename)
3. tab
4. tab
5. ↓
6. w
7. b
8. Enter