What This Software Does

Musical Class Break Timer is a modern countdown timer application designed specifically for classroom management, study sessions, and productivity breaks. Built entirely with vanilla HTML, CSS, and JavaScript without framework dependencies, the application provides teachers and students with an intuitive time management tool.
The timer features six preset durations (15m, 30m, 45m, 1h, 1h 15m, 1h 30m) for quick access alongside custom time input allowing hours, minutes, and seconds specification. Accurate timing using Date.now() prevents drift during countdown while an animated circular progress ring displays remaining time visually. Users can pause, resume, and reset the timer without losing progress.
The sound alert system includes three built-in alarm options (Dream, Inspire, Wing) plus custom MP3 upload functionality with 5MB maximum file size. Looping alarms continue until manually stopped with volume slider and mute toggle controls. Six color themes (Default Blue, Ocean, Forest, Sunset, Purple, Rose) personalize the interface while browser localStorage preserves preferences across sessions. The responsive mobile-optimized design ensures functionality across all devices.