How accurate is the timer?

Elapsed time is derived from the browser's monotonic performance.now() clock and displayed to hundredths of a second. Browser privacy settings may reduce clock resolution, background tabs can update less often, and this tool is not frame-timed or suitable for categories that require an official game-time method.

Are my personal bests saved?

Yes. Best segments and total time are stored per split-name profile in this browser's localStorage. They do not sync between devices. Clear Saved Personal Bests removes every saved profile.

Which keyboard shortcuts are supported?

Press Space to split, U or Backspace to undo the previous split, K to skip the current split, and P to pause or resume. Shortcuts work while this browser tab is focused.

Does an abandoned run overwrite my gold splits?

No. New best segments are committed only after the run is completed, so resetting or editing an unfinished attempt does not overwrite saved records.

What happens if I reload the page mid-run?

The active run is lost because the timer is entirely client-side, but your saved personal bests remain intact in localStorage.

How do I add or change splits?

Click "Edit Splits" to return to the setup panel. Changing split names will reset your personal bests for any renamed splits.

What is a gold split?

A gold split is your fastest time ever recorded for a specific segment. The timer highlights it in gold when you beat your previous best on that segment.

Speedrun Timer

A browser-based stopwatch for speedrun attempts with splits, undo, skip, pause, PB profiles and CSV export.

Split Names

One split per line. Leave blank to use defaults.

Splits

Gold split Ahead of PB Behind PB

Split

Segment

Best Seg

Total

+/- PB

Add split names on the left and start a run.

Timing runs locally in this tab. Saved profiles use this browser's localStorage; no split names or times are uploaded. The monotonic clock continues to determine elapsed time even if visual repaint updates are throttled in a background tab.

References: MDN performance.now() and Speedrun.com submission guidance. For leaderboard submissions, follow the category's official start, end and timing-method rules.

Summary

A browser-based stopwatch for speedrun attempts with splits, undo, skip, pause, PB profiles and CSV export.

How it works

Enter your split names (one per line) in the setup panel, then click "Start Run".
Press the Split button (or Space) each time you complete a segment.
Use U to undo a mistaken split, K to skip a checkpoint, or P to pause and resume.
The timer records each completed segment and compares it to your best.
Gold splits (personal best on that segment) are highlighted in yellow.
When the final split is recorded the run ends; use Reset to start a new attempt.
Your personal bests are saved in your browser and persist across sessions.

Use cases

Time any game speedrun with precise millisecond accuracy.
Track personal bests for individual game segments or checkpoints.
Practice specific sections by resetting after a target split.
Compare current-run pacing against your all-time best splits.
Use during races to see at a glance if you are ahead or behind.
Export the completed run and segment results as a CSV file.

Frequently Asked Questions

Last updated: 2026-09-22 · Reviewed by Nham Vu