[{"data":1,"prerenderedAt":80},["ShallowReactive",2],{"page:type=timer&slug=15-seconds&locale=en":3},{"locale":4,"alternates":5,"title":8,"description":9,"h1":10,"lead":11,"breadcrumbs":12,"sections":21,"faq":36,"related":49,"updated":74,"tool":75,"schema":77},"en",{"es":6,"en":7},"\u002Ftemporizador\u002F15-segundos","\u002Fen\u002Ftimer\u002F15-seconds","15 seconds timer ⏱ online with alarm","Free 15 seconds timer: press Start and an alarm rings when it ends. Full screen, several sounds and works offline.","15 seconds timer","15 seconds countdown with alarm.",[13,16,19],{"name":14,"path":15},"Home","\u002Fen",{"name":17,"path":18},"Timer","\u002Fen\u002Ftimer",{"name":20,"path":7},"15 seconds",[22,26,32],{"paragraphs":23},[24,25],"This timer is set to 15 seconds. That is 15,000 milliseconds. 240 timers like this fit in one hour and 5,760 in a day.","During 15 seconds a resting heart beats about 18 times and a person walks roughly 20 metres at an easy pace.",{"heading":27,"list":28},"What is a 15 seconds timer good for?",[29,30,31],"short exercise sets and rest between reps","games and quizzes with a time limit","quick breathing exercises and stretches",{"heading":33,"paragraphs":34},"How to use it",[35],"Press the space bar or the Start button. When it reaches zero your chosen sound plays; on the main timer page you can add and chain several timers for intervals. Sound and volume settings are saved in your browser.",[37,40,43,46],{"q":38,"a":39},"How many seconds is 15 seconds?","15 seconds equals 15 seconds.",{"q":41,"a":42},"How do I set a 15 seconds timer?","Press Start: the time is already set. You can pause it, reset it, change the sound or go full screen.",{"q":44,"a":45},"Will it ring if I switch tabs?","Yes. The timer keeps running in the background and rings when it ends as long as the page stays open; the tab title shows the time left.",{"q":47,"a":48},"Will my screen turn off?","In supported browsers the \"Keep the screen on\" option uses the Wake Lock API to prevent it.",[50,53,56,59,62,65,68,71],{"label":51,"path":52},"5 seconds timer","\u002Fen\u002Ftimer\u002F5-seconds",{"label":54,"path":55},"10 seconds timer","\u002Fen\u002Ftimer\u002F10-seconds",{"label":57,"path":58},"20 seconds timer","\u002Fen\u002Ftimer\u002F20-seconds",{"label":60,"path":61},"25 seconds timer","\u002Fen\u002Ftimer\u002F25-seconds",{"label":63,"path":64},"30 seconds timer","\u002Fen\u002Ftimer\u002F30-seconds",{"label":66,"path":67},"35 seconds timer","\u002Fen\u002Ftimer\u002F35-seconds",{"label":69,"path":70},"All timers","\u002Fen\u002Ftimer\u002Flist",{"label":72,"path":73},"Stopwatch","\u002Fen\u002Fstopwatch","2026-10-23T13:43:20.427Z",{"seconds":76},15,{"app":78},{"name":10,"category":79},"UtilitiesApplication",1792763000414]