Online Stopwatch: Precise Timing With Lap Tracking in Your Browser
A clean, accurate browser stopwatch with lap times, millisecond precision, and keyboard shortcuts. No app download needed.
Introduction
Sometimes you just need a timer. You are benchmarking a process, timing intervals at the gym, or running a timed exam. Reaching for your phone stopwatch works, but if you are already at your computer, our browser-based stopwatch is faster to access and easier to read. It shows hours, minutes, seconds, and hundredths of a second. Record unlimited lap times with a click, and use keyboard shortcuts for hands-free control. The timer keeps running even if you switch browser tabs.
Step-by-Step Guide
Start the timer
Click the Start button or press the spacebar. The timer begins counting immediately with millisecond precision displayed on a large, easy-to-read display.
Record laps
Click the Lap button (or press L) to record the current time as a lap marker without stopping the timer. Each lap shows both the split time and the cumulative elapsed time in a scrollable list.
Stop and reset
Click Stop (or spacebar again) to pause the timer. You can resume or reset from here. When you reset, the lap history clears and the display returns to 00:00:00.00.
Pro Tips & Best Practices
Use keyboard shortcuts for hands-free timing. Spacebar for start and stop, L for lap. This is essential when your hands are busy with another task.
If you need to time something that repeats (like workout sets), keep the stopwatch running and use laps. The split column shows each interval duration so you can compare sets.
Bookmark the page for quick access. Some browsers also let you pin tabs so the stopwatch is always one click away.
Common Mistakes to Avoid
Frequently Asked Questions
Does the stopwatch keep running if I switch tabs?
Yes. The timer uses timestamps rather than intervals, so it stays accurate even when the tab is in the background. The display updates when you return to the tab.
Can I export my lap times?
You can copy the lap table as text. For more structured export, select all lap data and paste it into a spreadsheet.
Is there a maximum time limit?
The stopwatch can run for hours without issues. The display shows up to 99:59:59.99. For timing events longer than 100 hours, a different tool is recommended.