Online Tuner — Guitar, Bass, Ukulele & More
Tune by ear with your microphone, no app needed. Play a string and the needle shows how sharp or flat you are; choose your instrument for string targets, or use chromatic mode for anything.
Click a string to hear its reference tone. Tune in a quiet room, and pluck one string at a time.
Everything runs in this browser tab. Nothing from your camera or microphone is uploaded or recorded unless you choose to save it.
How to use the online tuner
- Choose your instrument and click Start tuner, then allow microphone access.
- Pluck one string and let it ring. The note and needle show whether you are flat (left) or sharp (right).
- Turn the tuning peg until the needle is centered and the display turns green. Repeat for each string.
Tuning tips
Tune up to the note: if a string is sharp, lower it below the target and then bring it back up. This helps the string hold its tuning because slack in the gear is taken up.
Pluck with moderate force and let the note settle for a moment; the first instant of a pluck is slightly sharp. For bass, pluck gently near the neck and try the 12th fret harmonic if the low notes are hard to read.
Standard concert pitch is A4 = 440 Hz. Some orchestras use 442 Hz, and some recordings use 432 Hz; change the reference to match. New strings stretch and need retuning several times during the first few days.
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Frequently asked questions
What are the standard guitar string notes?
From the thickest string: E2, A2, D3, G3, B3, E4 ("Eddie Ate Dynamite, Good Bye Eddie").
What are ukulele string notes?
Standard tuning is G4, C4, E4, A4, with the G string higher than the C (reentrant tuning).
Why won't the tuner pick up my bass?
Low notes are harder for laptop microphones. Move closer, pluck gently, or use harmonics at the 12th fret.
Is my audio recorded?
No. Sound is analyzed in your browser in real time and never stored or uploaded.