TRENOLive is a new collaborative timetable planning and validation platform engineered to support the full lifecycle of timetable design - from short-term adjustments to long-term strategic planning. It empowers users with cloud-based real-time visualisation of train operations, seamless management of unlimited timetable and infrastructure variants, and integrated performance analysis. Fully aligned with the trenissimo microscopic simulator, TRENOLive enables planners to swiftly validate proposals under realistic operational conditions. Also offered as a Software-as-a-Service, it brings powerful simulation-ready planning tools directly into the browser.