Super Mario 64 70-Star Speedrun Timer

How precise is the speedrun timer?

Millisecond-accurate using a high-resolution browser clock. Resyncs against real time so even multi-hour runs stay clean.

Will it stay accurate if I tab out?

Yes. The clock is monotonic and continues to count across hidden tabs and locked screens (where the browser permits).

Can I share a run-in-progress?

Yes. Send the URL — anyone can open it on their own machine to follow along on the same category.

Is there a lap/split feature?

Tap the lap button to record splits without disturbing the main timer.