About Sunrise Alarm Clock
Last updated: November 12, 2026
Key takeaways
- Sunrise Alarm Clock turns your screen from dark to warm light over 10 to 45 minutes and can end with a gentle sound.
- It runs in the open page: keep the screen on and unlocked, and keep your phone's own alarm as a backup.
- It is a free tool, not a light therapy device. We make no medical or sleep claims.
What is Sunrise Alarm Clock?
Sunrise Alarm Clock is a free web page that imitates a sunrise on your phone, tablet or computer screen. You choose a wake-up time, and over the period before it the visible area of the screen changes from dark colours to warm light. At the wake-up time an optional sound fades in. You do not need an account or an app.
What can it do?
| Part | What it does |
|---|---|
| Sunrise | 10, 20, 30 or 45 minutes from dark to the light level you choose |
| Sounds | Nine sounds generated in your browser (birdsong, ocean waves, soft music, wind chimes, warm pad, forest dawn, gentle rain, forest stream, music box), your own audio file, or light only |
| Fade-in and volume | The sound rises gently at the wake-up time, up to the volume you set |
| Keep screen awake | Asks the browser to keep the screen on while the sunrise runs, where supported |
| Demo | 30 seconds: 24 seconds of light and 6 seconds of sound |
| Guides | What dawn-simulation research shows, using a phone as a sunrise alarm and waking up in the dark in winter |
What are its limits?
The page changes the colours on the screen, not the screen's hardware brightness, so the light is much dimmer than a sunrise lamp. It cannot turn on a sleeping screen or unlock a phone. If you switch apps, lock the screen or close the page, the session stops and is not restored. A regular session ends five minutes after the wake-up time. Always keep your phone's normal alarm as a backup.
How are the sounds made?
All nine built-in sounds are generated live in your browser by the site's own code with the Web Audio API. They are not recordings and contain no third-party samples. If you choose your own audio file, it plays only on your device and is never uploaded.
Who runs Sunrise Alarm Clock?
Sunrise Alarm Clock is run by Takreparation Skåne AB, Sparvgränd 6, 262 41 Ängelholm, Sweden (org.nr 556988-5931, VAT SE556988593101). CEO: Flemming Harboe Olsen. Flemming Olsen is a Swedish small-business owner who builds free web tools, and Sunrise Alarm Clock is one of them. Contact: info@sunrisealarmclock.app or +46 760 061 969, or see the contact page.
| Company | Takreparation Skåne AB |
| Address | Sparvgränd 6, 262 41 Ängelholm, Sweden |
| Org.nr | 556988-5931 |
| VAT | SE556988593101 |
| Managing director (VD) | Flemming Harboe Olsen |
| info@sunrisealarmclock.app | |
| Phone | +46 760 061 969 |
How is the site paid for?
Some pages show ads from Google AdSense, which keep Sunrise Alarm Clock free. Ads are placed away from the controls and results, so they are not clicked by mistake. In the EEA, the UK and Switzerland you are asked for consent before ad cookies are used; change your choice under "Privacy and cookie settings" at the bottom of every page. See the privacy page.
Frequently asked questions
Is Sunrise Alarm Clock free? Yes. There is no account and nothing to buy.
Will it work with my phone locked? No. The page must stay open, visible and unlocked. Use your phone's own alarm as a backup.
Can it treat winter tiredness or seasonal depression? No. It is not a light therapy device. If low mood or tiredness in winter affects your life, talk to a doctor.