I'm generating the JSON, either with custom C++ marshaling routines or with JSON.stringify which doesn't include newlines unless you give it extra arguments. I

I'm generating the JSON, either with custom C++ marshaling routines or with JSON.stringify which doesn't include newlines unless you give it extra arguments. I believe that any valid JSON can be converted to a single line by changing any '\n' bytes to ' '. Literal '\n' bytes are not allowed inside strings, and outside strings any whitespace is equivalent.