The self-taught pianist, whose real name is Vincent Belorgey, would have turned 51 on Friday.
It was not immediately clear how he died, but emergency crews late Tuesday noted nothing suspicious, the Paris prosecutor's office said.
"Nightcall" became a global hit after it was featured in the soundtrack of 2011 movie "Drive" starring Ryan Gosling. It was later covered by English indie pop band London Grammar.
After Kavinsky performed it at the closing ceremony of the 2024 Summer Olympics in Paris, it became the most sought-after tune ever in a single day on the Shazam app.
Culture Minister Catherine Pegard said France had lost "one of its most singular voices".
