A sleek countdown timer for classroom management and study sessions featuring six preset durations, custom time input, circular progress animation, three built-in alarms, custom MP3 upload, and six color themes.
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.
Powerful features that make this solution stand out
Six quick-access preset durations (15m to 1h 30m) plus custom hour/minute/second input with accurate Date.now() timing to prevent drift.
Animated circular SVG progress indicator displaying remaining time visually with smooth countdown animation and real-time updates.
Three built-in alarms (Dream, Inspire, Wing) plus custom MP3 upload (5MB max) with looping functionality, volume control, and preview capability.
Full timer control allowing pause and resume functionality without losing progress plus reset button to return to 00:00:00.
Six color themes (Blue, Ocean, Forest, Sunset, Purple, Rose) with browser localStorage preserving user preferences across sessions.
Mobile-optimized interface built with vanilla HTML5, CSS3, and JavaScript ensuring compatibility across desktop, tablet, and smartphone devices.
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