"We are taking the initiative to build a coalition to gather the necessary resources, including military means, to resume and secure traffic on these sea routes, which are crucial for the global economy," Macron said in a speech.
The president confirmed that the French aircraft carrier Charles de Gaulle is on its way to the Mediterranean.
Shipping through the Strait of Hormuz in the Persian Gulf has effectively stopped, and Iran has attacked several commercial ships in the area.
The strait is the world's most important transport route for oil exports - normally 20 million barrels of oil pass through every day.
