Tune instruments online with Astro Martian's free Chromatic Tuner. Use your device microphone to detect the pitch of a note in real time and see whether it is sharp, flat or in tune — ideal for guitar, bass, ukulele, vocals and other instruments.
NOTE: The Chromatic Tuner requires microphone access to analyse live audio. Pitch detection results may vary depending on background noise, microphone quality, instrument tone and device performance.
Allow microphone access when prompted, then play or sing a clear sustained note near your device. The tuner will analyse the incoming audio, identify the detected note and show whether the pitch is sharp, flat or in tune. Adjust the pitch and play the note again until it is centred.
A chromatic tuner detects musical pitch across all twelve notes of the chromatic scale rather than being limited to one particular instrument or tuning. This makes it useful for tuning guitars, basses, ukuleles and other instruments, as well as checking the pitch of vocals and individual notes.
If a note is sharp, its pitch is higher than the target note. If it is flat, its pitch is lower. Adjust your instrument until the tuner indicates that the detected pitch is centred and in tune.
The Astro Martian Chromatic Tuner can be used with many instruments that produce a clear musical pitch, including guitar, bass, ukulele and other stringed or melodic instruments. It can also be used to check sung notes and vocal pitch.
Pitch detection can provide a useful tuning reference, but accuracy may vary depending on your microphone, background noise, instrument, browser and device. For the best results, use the tuner in a quiet environment and play one clear sustained note at a time.