Online Stopwatch with Laps — Free Chronometer & Lap Timer

Online Stopwatch with Laps — Free Chronometer & Lap Timer. Free online stopwatch with laps and milliseconds. Start, stop, record split times, spot your fastest lap and export lap times to CSV — a precise chronometer that runs in your browser.

This online stopwatch measures elapsed time to the millisecond right in your browser — no app, no signup. Press Start and the chronometer counts up in hours, minutes, seconds and milliseconds; press Stop to pause and Start again to resume without losing time.

Because the display is calculated from the system clock rather than by adding up animation frames, it stays accurate even when the tab is busy, which makes it a dependable stopwatch with milliseconds for sports, experiments, cooking, presentations and benchmarking code.

Need split times? Hit Lap (or press L) while the timer runs and the lap timer records each lap's duration and the running total.

With two or more laps the table highlights your fastest and slowest lap and shows the average lap time — perfect for interval training, swimming and running splits, karting, speech rehearsals or timing repeated tasks.

Keyboard shortcuts keep your hands free: Space starts and stops, L records a lap and R resets. When you are done, copy the lap list to your clipboard or download it as a CSV file for Excel or Google Sheets.

Everything runs locally: your timings are never uploaded, and this free stopwatch with laps keeps working offline once the page has loaded. It works on desktop and mobile, in any modern browser, and the large monospaced digits are easy to read from a distance.

For focused work sessions try the Pomodoro Timer; to estimate when a long job will finish use the ETA Calculator, and to count the time between two dates use Days Between Dates.

Frequently asked questions

How do I use the online stopwatch?

Click Start or press Space to begin counting. Click Stop or press Space again to pause, then Start to continue from the same time. Reset, or the R key, sets the time back to zero and clears all laps; if the stopwatch is running, it keeps counting from zero.

How do I record lap or split times?

While the stopwatch is running, click Lap or press L. Each lap is added to the Laps table with its lap time and total time, and the current lap is shown under the main display. With two or more laps, the fastest and slowest are tagged and the average lap time is shown.

Can I export my lap times?

Yes. Copy laps copies a tab-separated list that pastes neatly into a spreadsheet or message, and Download CSV saves stopwatch-laps.csv with the lap number, lap time and total time, plus both values in milliseconds.

How accurate is this stopwatch with milliseconds?

Elapsed time is calculated from the system clock rather than by counting animation frames, so it does not drift when the tab is busy or when you pause and resume. The display shows milliseconds, but real-world precision also depends on your reaction time and device.

Does the stopwatch keep running if I close the tab?

No. The time and laps exist only in the open page and are not saved, so closing or reloading the tab resets them. Switching to another tab is fine: when you come back, the elapsed time is still correct.

How to use this online tool

Online Stopwatch with Laps — Free Chronometer & Lap Timer is designed for fast browser workflows when you need to format, validate, convert, decode, encode, generate, or inspect data without opening a heavy desktop app. Start with the input field or visible options, review the result, then copy or download the output for the next step.

Private processing in your browser

Online Stopwatch with Laps — Free Chronometer & Lap Timer keeps the normal processing step local in your browser. That is useful for code snippets, tokens, documents, configuration values, text samples, and other material that should not be sent to a remote service unless you explicitly choose to share it.

When this tool is useful

Use Online Stopwatch with Laps — Free Chronometer & Lap Timer for repeatable developer tasks, technical documentation, QA checks, quick conversions, debugging, content cleanup, and internal team workflows. The page focuses on clear inputs, immediate feedback, and output that is easy to reuse in code, reports, tickets, emails, or notes.

Practical tips

Before copying the final result, check important details such as spacing, casing, filenames, encoding, token structure, line breaks, or output format. Small checks prevent mistakes when the result is reused in source code, API requests, documentation, spreadsheets, or shared files.