Any pitch
Chromatic guitar tuner
String mode pulls toward E, A, D, G or B. That helps open strings and gets in the way when you are checking an F# at the second fret, a note under a capo, or a tuning this site does not list. Chromatic mode only asks which note this is, and how far from center.
Fretted notes and harmonics
The 12th-fret harmonic and the fretted 12th should both sit an octave above the open string, within a few cents of each other on a settled setup. This page shows the reading. It does not tell you to move a saddle. For a fret-by-fret log, use the intonation tester, and leave the screwdriver work to someone who can hear the guitar in the room.
Calibration still matters
A4 defaults to 440 Hz. Orchestras and old tracks sometimes sit at 442 or a little flat. Move the reference and every nearest-note calculation follows. The cents display is the distance to that grid, not a judgment of your vibrato.
Questions
- How is this different from the main tuner?
- The main tuner compares you with six open-string targets. This one compares you with the closest note on the chromatic scale, whatever you played.
- Can I tune a bass or a ukulele here?
- If the pitch falls between about 70 and 1200 Hz and rings clearly, the detector will name it. The page is written for guitar, and it does not store a ukulele string map.