
About
A free online chromatic tuner that operates in your browser, offering both 440Hz and 432Hz reference pitches. It detects pitch in real time using your microphone for instruments like guitar, bass, winds, or voice. The tool includes a drone player featuring all twelve notes and various waveforms. You can switch between 440Hz and 432Hz with a single tap. It functions offline following your initial visit and can be installed to your home screen. Why 432Hz? Certain musicians favor this tuning. Our purpose is not to debate but simply to provide the choice. It is completely free, requires no registration, and is not distributed through an app store.
Launched
June 6, 2026Week 13
Builder
BU
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