"Sign into your account" or "Sign in to your account"? [duplicate]

Solution 1:

At the technology magazines where I've worked, our house style was to say "sign in to" and "log in to" instead of "sign into" and "log into." The rationale was that "sign in" and "log in" are verb phrases, not verb + start-of-a-prepositional-phrase combinations. In practice, however, it is sometimes quite difficult to tell which camp a particular pairing falls into.

For example, it seems reasonable to use the combination "plugged into" in the sentence "Make sure that your charger is plugged into the wall." But what about the figurative use "Zoltan is plugged in to all the latest high-tech developments"? There I'd argue for "plugged in to," on the rationale that "plugged in" (rather than simply "plugged") is essential to the action.

I don't see a bright line here that you can use for guidance in future instances; instead, I see these sorts of phrases as falling on a continuum where deciding between "in to" and "into" is sometimes fairly easy and sometimes quite difficult (and highly subjective). For some people, "sign in to" versus "sign into" may be a difficult call, but in that particular case I think that our house style decision makes sense.

Solution 2:

Obviously the answer to this is in a state of flux as the technology age continues its maturation.

The rule I've followed for the past few years based on various tech style manuals is that login is a noun, while log (in the sense of logging in) is a verb. Thus:

What is your login?
I have forgotten my login.
How do I log in to the computer?
How do I log in quickly?

Solution 3:

People are regularly invited to simply sign in. As such sign into would seems inapposite.

This ngram strongly supports that view.