Login is a noun (and adj). Log in is a verb.
So the right one to use depends somewhat on the context. It's the "login page" but "you need to log in". But it's not super clear in all cases.
So the right one to use depends somewhat on the context. It's the "login page" but "you need to log in". But it's not super clear in all cases.
What do you make of "log off" vs. "log out"? I feel like I used to hear the former (and its complement "log on") somewhat often, but everything seems to use "log in/out" now.
If you're saying e.g., "I got this pdf offline", I would argue your usage is incorrect and that saying, "I downloaded this pdf","got it online", or some variant would be more accurate.
That is, unless you would consider, 'got it offline' to be an idiomatic expression for 'downloaded/retrieved-from-the-internet' in whatever region you're from. ~