Free Online Stopwatch with Laps & Statistics
Whether you are timing a presentation rehearsal, tracking workout intervals, measuring cooking durations, or benchmarking code execution, a reliable stopwatch is something everyone needs occasionally. Our free online stopwatch runs entirely in your browser, delivers hundredth-of-a-second precision using requestAnimationFrame, and packs features you usually only find in dedicated mobile apps — lap recording, best/worst highlighting, statistical summaries, and one-click export.
Unlike many basic online timers, this stopwatch does not drift or lose accuracy over long sessions. It uses the high-resolution Performance API internally, so even if you switch tabs and come back, the elapsed time stays accurate. No sign-up, no ads blocking the controls, no install — just open the page and press Start.
How to Use the Online Stopwatch
Click Start (or press the Space bar) to begin timing. The display updates in real time down to the hundredth of a second. While the stopwatch is running, press Lap to record a split. Each lap shows the individual lap time and the cumulative total. Press Pause to stop the clock without losing your progress, then Resume to continue from where you left off. Hit Reset to clear everything and start fresh.
When you have two or more laps, the stopwatch automatically highlights the best (fastest) and slowest laps and displays aggregate statistics at the bottom of the table — average lap time, best, slowest, and the spread between them. Use the Copy All button to export your lap data as a tab-separated table you can paste into a spreadsheet, document, or message.
Why Use This Stopwatch?
- High accuracy — built on the browser's Performance API for sub-millisecond timing resolution.
- Unlimited laps — record as many splits as you need with automatic best/worst tagging.
- Statistics dashboard — average, best, slowest, and spread calculated live.
- Export ready — copy lap data as a clean table for spreadsheets or notes.
- Works offline — once the page loads, no internet connection is needed.
- No installation — runs in any modern browser on desktop or mobile.
- Privacy first — all timing happens locally. Nothing is sent to a server.
Common Use Cases
Fitness & Sports: Time running intervals, rest periods, or circuit training rounds. Record laps for each set and compare performance across sessions.
Presentations & Speaking: Rehearse a talk and track how long each section takes to keep within your allotted time slot.
Cooking & Baking: Time steeping, boiling, or proofing durations where precision matters.
Education & Exams: Set up timed practice sessions for students and record completion times per question.
Development & Benchmarking: Manually time user flows, page loads, or build processes during testing.
Frequently Asked Questions
Is this stopwatch accurate enough for professional timing?
This stopwatch uses the browser's Performance API and requestAnimationFrame, which provides timing resolution well below one millisecond on modern browsers. While it is excellent for everyday tasks — workouts, cooking, speeches, and benchmarking — certified sporting events require dedicated hardware timers.
Will the stopwatch keep running if I switch tabs?
Yes. The stopwatch records a start timestamp and calculates elapsed time relative to it, so switching tabs or minimizing the window does not cause drift. The display may pause visually while the tab is inactive, but the elapsed time catches up immediately when you return.
Can I export my lap times?
Click the "Copy All" button above the lap table to copy all lap data as a tab-separated table. Paste it directly into Google Sheets, Excel, Notion, or any text editor.
Does this work on mobile devices?
Absolutely. The interface is fully responsive and touch-friendly. The large start/pause button and clear layout make it easy to use on phones and tablets.
Is any data sent to a server?
No. The entire stopwatch runs client-side in your browser. No timing data, lap records, or any other information is transmitted anywhere.