Plugs from Switzerland plug directly into wall sockets in France, and mains voltage is compatible (230V vs 230V). Still verify that your high-power appliances support 230V.
Compare leading certified universal travel adapters equipped with multi-region prongs, GaN fast charging, and auto-resetting safety fuses.
Look at your device power brick or label:
Yes. Phone chargers are universal dual-voltage (100-240V). If the plug prongs do not match, a standard travel plug adapter is all you need.
France uses Type C, E. Look for 3-pin adapters if your appliance uses a grounded plug.