Is it on to something or onto something?

It can be “on to something” or “onto something” depending on the context. Choosing onto or on to changes the meaning.

“Be onto something or someone” is an idiom that means “to be aware of something or someone” (e.g., “With these recent clues, you might be onto something”).

“On to something” can appear when “on” is part of a phrasal verb (e.g., “I like hanging out with her because she’s always turning me on to something new”).

To avoid mistakes with these phrases, try QuillBot’s free Grammar Checker.