Krasniqi, who was born in Albania but raised in London, spent four years with the Broncos before joining Salford two years ago.
Red Devils coach Ian Watson said: "Olsi has been a great player for us and I've thoroughly enjoyed coaching him. You certainly can't question Olsi's commitment to the cause - he's somebody you know will go out there and give 100%, put his body on the line and wear the shirt with pride.
"I, along with everyone at the club, would like to wish Olsi all the best for the future."
Krasniqi said: "A few weeks ago I made the decision to leave the club. The two-and-a-half years I've been here have been the most enjoyable of my career to date, which made leaving even harder."
ðŸ‘🻠Olsi Krasniqi is set to leave the Red Devils at the end of the 2017 season.
— Salford Red Devils (@SalfordDevils) September 5, 2017
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