The French Parachuting Federation announced his death on social media.
“It is with profound sadness that we announce the passing of Pierre Wolnik,” the message read.
“Pierre leaves behind the memory of a teammate whose presence will forever be etched in the hearts of his loved ones.
“Today, the entire sport parachuting community mourns and pays tribute to a young man renowned for his talent and his exceptional character.”
Wolnik won the world championship in 2022 and 2024 and was due to compete in this year’s competition.
Although wingsuit fliers are known for base jumping, which is considered one of the most dangerous sports in the world, skydiving is usually relatively safe.
Depending on yearly variation, there is around 1 death per 200,000 to 400,000 jumps recorded in the US, according to the United States Parachute Association.