If you search for an "online alarm clock" or "timer" today, you'll probably land on websites that look like they were built in 2010. They are usually filled with intrusive ads, lack native dark mode, and drain your laptop battery with unoptimized scripts.
As a developer, I got tired of this. I just wanted a simple tool to set my Pomodoro timers or morning alarms without going blind from an all-white screen.
So, I decided to build my own solution: OnlineAlarmClock.io.
The Core Idea: Simplicity & Speed
When building utility apps, the most important metric is how fast a user can complete their task. I focused on three main pillars:
Native Dark Mode: A sleek, distraction-free UI that doesn't hurt your eyes, whether it's 2 PM or 2 AM.
PWA Support: You can install the site as an app on your desktop or mobile device. It works smoothly in the background.
Task-Specific Routing: Instead of forcing users to navigate a complex menu, I built specific URLs for common needs. For example, if you just want a quick focus session, you can directly go to the 25-Minute Timer page and it starts instantly.
Tech Stack & Performance
The goal was to keep the DOM incredibly light. By leveraging modern web APIs, the alarm will ring consistently even if you switch tabs. The Screen Wake Lock API ensures your device doesn't go to sleep while you are tracking your study or cooking time.
I also recently submitted a Chrome Extension to make accessing the timer even faster.
Feedback Welcome!
I'm currently treating this as an open learning project and trying to optimize its performance further. If you have a minute, check out the live site and let me know how the UI feels.
What features would you consider a "must-have" for a modern browser-based timer? Let's discuss in the comments!
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