The 22-year-old has penned a one-year deal at Adams Park following his release by the Pilgrims at the end of last season.
Boss Gareth Ainsworth said on the club website: “Jason is the type of player who will get supporters on their feet and I’m delighted to bring him here.
“He’s got pace, trickery and he can be the spark that can win you a game with one moment of magic. We saw what he’s capable of in the play-offs and we’re confident we can bring that out of him on a consistent basis and make this club his home.”
Banton played 40 times for Plymouth in an 18-month stay.