Nap Timer
Nap length
Dedicated timers
More time tools
Features
About the nap timer
This free nap timer is built for a quick, refreshing rest. Pick a research-backed length — a 10-minute cat nap, the classic 20-minute power nap, the 26-minute "NASA nap", 45 minutes, or a full 90-minute sleep cycle — or nudge it to any length. Start, and a big, dim countdown fills the screen.
As you settle, the screen fades gently darker so it will not keep you up, and the timer keeps your device awake so it never sleeps before you do. At the end a soft chime rises slowly to wake you without a jolt, and rings until you stop it. Everything works offline, and you can mute it for a silent nap.
Frequently asked questions
Is the nap timer free?
Yes — completely free, no ads, no sign-up and nothing to install. It runs right in your browser.
How long should a nap be?
For a quick lift without grogginess, 10 to 20 minutes is ideal. 26 minutes is a well-known NASA-study length. 90 minutes fits a full sleep cycle. Avoid roughly 30 to 60 minutes if you tend to wake up groggy.
What is a power nap?
A power nap is a short nap of about 10 to 20 minutes that boosts alertness without entering deep sleep, so you wake refreshed rather than groggy. Use the Power nap preset.
Why do I wake up groggy?
Waking from deep sleep, often after about 30 minutes, causes "sleep inertia" — that groggy feeling. Keeping naps short (under about 25 minutes) or doing a full 90-minute cycle usually avoids it.
When is the best time to nap?
Early afternoon, roughly 1 to 3 pm, is the natural dip in alertness and the most common recommendation. Napping too late in the day can make it harder to fall asleep at night.
How does it wake me?
A soft chime fades in gently at the end and keeps ringing until you stop it, so you are eased awake rather than startled. You can mute it beforehand if you prefer a silent finish.
Will my screen turn off during the nap?
No — the timer keeps the screen awake so it can wake you at the end, and it also fades the screen darker on its own so the light does not keep you up.
Does it work offline?
Yes. Once the page has loaded it runs entirely in your browser, so it keeps working without a connection.