Pano Tuner

Pano Tuner is a free chromatic tuner that runs entirely in the browser — no app to install, no account, no ads. Point a microphone at any instrument and it reads back the note, octave and how many cents sharp or flat you are, the same way a clip-on or pedal tuner would. Because it is chromatic rather than tied to one instrument's presets, it works for guitar, bass, ukulele, violin, mandolin, banjo, kalimba or anything else that makes a pitched sound — including alternate tunings like Drop D, Open G, DADGAD or Half-Step Down, which have their own dedicated reference pages with one-tap target tones for every string. No microphone handy, or don't want to grant permission? A reference-tone mode turns it into a pitch pipe instead — pick any note from C0 to B8 and play it back to tune by ear.