Visitors can buy Eiffel Tower tickets online safely and easily through the official ticket website at ticket.toureiffel.paris, where you can choose the date, time, and type of visit (e.g., 2nd floor or summit) and receive an e‑ticket by email. Tickets typically go on sale up to 60 days before your visit and are best booked early to avoid sell‑outs. Be cautious of unofficial sites and scams, as there’s only one authorized online seller for standard entry tickets. Alternatively, unsold tickets may be purchased on site at the monument’s ticket office on the day of your visit.