Timerjoy

Timerjoy offers free, browser-based timers, stopwatches, and countdowns so you can track time without downloads or sign-ups. Start quick presets for seconds, minutes, or hours, or build custom visual and classroom timers. The site also provides a world clock, time zone tools, date and age calculators, sunrise and sunset times, moon phases, and breathing and workout timers for HIIT, Tabata, and intervals.