Set an alarm for 5:30 am
A free alarm set for 5:30 am, running in your browser. Keep the tab open and it will go off. For an alarm that survives a locked phone, silent mode and Focus, use the app.
Current time
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Take it with you in the app
This tool runs in your browser. Want it on your phone, with voice cues, background timing and a real alarm? Open the same tool in NanoTimer.
Open on your phoneOpens the right tab in NanoTimer on your iPhone.
Download on theApp StoreLink coming soon
How it works
- The time is already filled in at 5:30 am.
- Tap Set alarm. You will see how long is left until it rings.
- Keep this tab open so the sound can play.
- Tap Stop when it rings.
Frequently asked questions
- What time should I go to bed to wake up at 5:30 am?
- Counting back in 90-minute sleep cycles, plus about 15 minutes to fall asleep: 8:15 pm (6 cycles, about 9 hours), or 9:45 pm (5 cycles, about 7.5 hours), or 11:15 pm (4 cycles, about 6 hours). Treat it as a rule of thumb: real cycle length differs per person and per night.
- Will this alarm work if I close the tab or lock my phone?
- No. A browser alarm needs an open, awake tab. That is exactly why a phone alarm app exists: NanoTimer uses AlarmKit (iOS 26+), so it breaks through silent and Focus and keeps ringing until you stop it.
- Can I set a different time?
- Yes, just change the time field. The alarm will ring at the next occurrence of that time, today or tomorrow.