Focus & productivity
Tracking time with a stopwatch
Online Stopwatch runs entirely in the browser, with lap times included. Works offline after the first load.
Time · 2 tools
Every second,
perfectly timed
Stopwatches, countdowns, and time calculations — running locally in your browser with millisecond precision. No app installs, no uploads.
2 tools
0 uploads
1,488 uses/mo
// 2 tools
Online Stopwatch
Stopwatch with lap splits and millisecond precision — start, stop, and record lap times in your browser
00:04.27 · laps: 3
Countdown Timer
Count down a duration or down to any date, with an optional alert when time runs out.
02 h · 34 m · 17 s
How to choose
Pick the right tool for your task
Deadlines & events
Counting down to a date or time
Countdown Timer displays a live countdown in days, hours, minutes, and seconds. Share the URL with your team so everyone sees the same deadline.
Which tool?
Stopwatch vs. countdown timer — which to use
Use the Stopwatch when measuring elapsed time from now. Use the Countdown Timer when you have a fixed end time — a meeting, a deadline, or a launch.
Precision timing, zero compromise
Tool Matic's time tools are built on the browser's native performance and timer APIs — the same high-resolution clocks that power modern games and scientific instruments. Every tick, every lap, every countdown happens locally with sub-millisecond accuracy.
Shareable countdown links encode all their data in the URL — no server required, just copy the link and anyone with it sees the same live countdown.
Why Tool Matic time tools
- Millisecond precision Uses performance.now() — accurate to 0.1 ms in modern browsers.
- Offline capable Works without a network connection — ideal for fieldwork or low-connectivity environments.
- Shareable countdowns Countdown links encode the target time in the URL — no backend required.
- Fullscreen mode Stopwatch and timer expand to fill any screen — perfect for races, presentations, or kitchens.
Frequently asked questions
How accurate is the online stopwatch?
The stopwatch uses
performance.now(), which provides sub-millisecond resolution in all modern browsers. Display precision is limited to centiseconds (1/100th of a second) for readability, but the underlying timing is far more precise.Can I share a countdown with someone else?
Yes — the countdown timer generates a shareable URL that encodes the target date and time. Anyone with the link can open it and see the same countdown ticking in real time, with no server involved.
Does the stopwatch keep running if I switch tabs?
Yes. The timer records a start timestamp and computes elapsed time on each frame — so switching tabs or minimizing the window does not affect accuracy. You can switch away and return without losing your time.
Are there limits on how many laps I can record?
No hard limit — laps are stored in memory during the session. For very long sessions with hundreds of laps, you can copy or export the lap data. Refreshing the page resets the stopwatch.
Will more time tools be added?
Planned additions include a Pomodoro timer, a time-zone converter, a date difference calculator, and a scheduling tool. All will follow the same browser-native, no-upload approach.