Free online metronome, tuner
and tone generator in your browser.
Keep time with a precise metronome, tune any instrument with the chromatic tuner, play any frequency with the tone generator and look up every note in the note frequency chart. Everything runs on your device with the Web Audio API, with no sign up and nothing uploaded.
Allegrocheerful, lively
Tap a beat to cycle it through accent, normal and mute.
Space start/stop ↑↓ tempo, shift for 5 T tap
That is the full metronome, 40 to 240 BPM. Press space to start and stop. Open it on its own page or find the tempo of a song by tapping.
Timing
Pitch & tuning
Reference data
45 tunings across 12 instruments, every string with its note and exact frequency in Hz.
All 108 notes from C0 to B8 in Hz, with MIDI numbers and six reference pitches.
The whole lot as keyless JSON under CC BY 4.0. No account, no rate limit, CORS open.
Put the metronome or tuner on your own site with one line of HTML. Free, no script.