Plaintext is readable as-is, without any explicit conversion step. That being said, if you really want a code review device, you might want to look at a cheap l

Plaintext is readable as-is, without any explicit conversion step. That being said, if you really want a code review device, you might want to look at a cheap laptop or tablet, for one basic reason: there's no direct text editing available on the Kindle, and annotations are painful to write because of the keyboard. The DX doesn't even have numbers on the main keymap, so you have to use a symbol shift to type them.