Play bass guitar online
Use your computer keyboard or click on the strings to play the bass guitar. The four rows of keys on your keyboard correspond to the four strings on the bass guitar.
Click "Highlight" above the bass guitar to show note names on the fretboard. Click "Mark" to mark notes on the fretboard. Press and hold the alt key on your keyboard to mark notes with ♯ instead of ♭.
Save your markings on the bass guitar by copying the web address in your browser. This also allows you to share your markings with others. For example, here is a A major scale and the bass notes for the song Bitter Sweet Symphony.
Online bass guitar tuner
Click the "Tuner" button to activate the tuner. Click the string you want to tune, and play the corresponding string on your bass guitar so the two notes sound together.
If your string is slightly out of tune, you will hear a pulsating sound between the two notes. As you tune the string, the pitches get closer and the pulsation slows. When the two notes match perfectly, the pulsation stops and the two notes sound, as one.