WorkoutTimer is a free web-based interval timer that lets you create custom workout routines with work/rest intervals, follow pre-built templates like HIIT and Tabata, and track your exercise history and calories burned.
Choose a pre-built template or create your own routine in the Builder tab. Add exercises with work and rest times, then start the timer. Audio beeps will notify you when to switch between work and rest phases.
It runs entirely in your browser with no app install needed. It works offline, tracks your workout history, estimates calories burned, and supports multiple languages.
Yes, WorkoutTimer is completely free to use with no ads or subscriptions. Your data is stored locally on your device.