About swifttimer

swifttimer is a stopwatch and countdown timer that loads in a second and works without a sign-up, an app, or a notification permission. It runs in your browser, locally. There is no account, no syncing, no premium tier.

Who built it

My name is Onurcan Donmezer. I am a software developer based in Vienna, Austria. I made swifttimer for myself, originally — I wanted a Pomodoro timer that I could keep open in a pinned tab and would not nag me to install anything. It turns out a lot of other people wanted the same thing.

How it works under the hood

The timer uses performance.now() for sub-millisecond precision and corrects for browser tab throttling so the displayed time stays accurate even when you switch away. The audio cue is played via the Web Audio API. None of this requires permissions, plugins, or a network round-trip.

Editorial standards

The articles on the blog are written by me, from personal use. The Pomodoro article in particular is the result of about eight years of doing the technique badly before I figured out what was wrong. If you find a mistake, email me at hello@swifttimer.com and I will fix it.

Contact

Email: hello@swifttimer.com
Legal: see the imprint.