Uses your microphone. The sound is analysed right here on your device and never leaves it; nothing is recorded. Your browser will ask for permission.
Pluck one string at a time and let it ring. Green means within ±3 cents. In an instrument mode the tuner picks the nearest string; tap a string above to hear its note.
Space start/stop · ↑↓ tempo (Shift ×10) · T tap
Beat buttons cycle accent → normal → soft → silent. Clicks are scheduled on the audio clock, so they stay exact even in a background tab.
Stops counting and starts over after a 2-second pause. Esc resets.
Computer keys: A–' white, W E T Y U O P black, Z/X octave, hold Space to sustain.
Shares the metronome's tempo. Start both and they lock to the same bar. The pattern lives in the page address, so a copied link plays the same beat.