Does anything leave my device?

No. Every sound is made in your browser, and your settings stay on your device.

Does it work offline?

Yes. Once this page has loaded, it keeps working without an internet connection.

Check that your device isn't muted and the volume is up. Browsers only play sound after you press a button on the page.

Tap along to a song with a key or a button to find its tempo in beats per minute.

Does anything leave my device?: No. Every sound is made in your browser, and your settings stay on your device.
Does it work offline?: Yes. Once this page has loaded, it keeps working without an internet connection.
Why can't I hear anything?: Check that your device isn't muted and the volume is up. Browsers only play sound after you press a button on the page.

Ready-made settings for common jobs.

More tools for tuning, timing and practice.

BPM, time signatures

Drum machine, loops

Microphone, any instrument

Any frequency or note

Diagrams in every key