The German spent almost eight seasons in north London and has bid farewell to the club's supporters in an open letter.
Ozil wrote: "It is difficult for me to put into words the love I feel for the club and the fans. How could I possibly describe eight years of gratitude in a single letter?
"I will be a Gunner for life - no doubt about that. I'd like to thank the club for this amazing journey over the past seven-and-a-half years.
"The support I have felt from the team and fans during my time here has been truly incredible and something I will always be grateful for.
"Together we won trophies for the first time in years and created memories that will last a lifetime. The Arsenal fans will forever remain in my heart.
"Arsenal is a club of class and prestige, something that I felt every time I walked on to the pitch.
"Players, staff and management always come and go - but the club's values and fans will remain forever.
"The principles of class, respect and dignity must never be forgotten. It is the responsibility of every single person from the club to make sure they carry out their job in the name of these values.
"I'd like to thank Edu Gaspar for helping bring about a professional and dignified solution in the past few days, and I wish everyone at the club the best in their attempt to continue to bring Arsenal back to the top, where we belong."