SafeTow is a free online towing safety calculator helping Australian drivers ensure vehicle weight compliance with regulations. It checks gross vehicle mass, combined mass, trailer mass, tow ball mass, and payload against Australian Design Rules, NHVR guidelines, and state standards. Drivers use a three-step interface to select their vehicle, input compliance plate figures like kerb and trailer weight, and add cabin and cargo details. Covering over 100,000 Australian vehicles, SafeTow provides real-time compliance indicators factoring in tow ball mass and payload squeeze. The tool requires no registration, collects no personal data, and delivers results in 30 seconds. It explains concepts like ATM vs. GTM, offers towing guides for popular vehicles, and educates drivers on weight distribution, caravan snaking prevention, and weighbridge use. SafeTow highlights safety risks of exceeding weight limits, such as longer braking distances and reduced control.