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Free Online Guitar Tuner

Kevin Ott
tuning guitar

Digital tuners use your computer's built-in microphone to pick up the sound of your guitar. Typically they use a dial with a marker in the center. If your string is in tune, the needle of the tuner moves to this center marker. A tuner will often light up green when the pitch hits this marker. If the needle is to the left of the marker, the string is flat and its pitch should be raised. If it is to the right of the marker, the string is sharp and its pitch should be lowered.

Digital Guitar Tuner Sites

All digital tuners require Adobe Flash, which is free to download.

  • Screenshot of jamplay online guitar tuner
    Jam Play online guitar tuner
    Pro Guitar Tuner uses your computer's microphone and Flash player. You give the site permission to use your microphone and Flash, you play a string on your guitar, and the tuner will pick up the sound that you played. If the needle drifts to the left or right into the yellow or red, you tune the string higher or lower until the tuner shows green.
  • Jam Play functions in the same manner as the Pro Guitar Tuner, but it offers both a digital tuner and a tune-by-ear tuner. It has an appealing display with a light grid that illuminates green when you're in tune.

The tuners above can be used with any six-string guitar, acoustic, electric, or classical. With digital tuners you also have the option to bypass the computer's built-in microphone and tune your guitar even if you're in a noisy room or in the middle of a rock concert where you can't hear your notes. To take advantage of this convenient feature, you will need to buy an adapter that plugs your guitar directly into your computer. The tuner will then receive your notes without using a microphone.

Tune-By-Ear Sites

If you don't like tuning using a visual guide as described above, you will need a tune-by-ear tuner. This means the tuner simply plays the proper note back to you, and it is your job to then play the corresponding string on your guitar and match it to what you're hearing. The following sites offer excellent tune-by-ear tuners that can be used on any six-string guitar.

  • Screenshot of guitar tuner website
    Fender guitar tuner the famous guitar manufacturer has a free tuner on its site that plays each note of the six guitar strings when you click on them. It has loop options so that it will play the note repeatedly until you're able to tune your guitar. This tuner also has very high-quality audio, and its interface is simple to use. It offers many alternative tunings besides the standard guitar setting.
  • provides both a guitar tone and a non-guitar tone for tuning playback, as well as a delay function to make the notes last longer as you tune your guitar to the playback. It also has a separate mode for alternative tunings with dozens of preset tuning configurations.
  • gives the guitarist the ability to customize the tuner based on a simple system of choosing which note you want for each string. It does have preset tunings to save you time, but if you need flexibility for tunings that you often create yourself, this site will allow full customization.
  • This 12-string guitar tuner, also a design, offers an easy-to-use tuner for 12-string players with clear diagrams of how to tune each of the 12 strings, which can be a daunting task for any level of musician. Fortunately, this site's step-by-step guide makes it simple.

These five tuning sites provide a variety of visual styles and interface designs, from the most simple to the most lavish. As you experiment with each one, make sure to bookmark the ones you like the best.

Understanding How a Tuner Works

Each tuner above, whether it is digital or tune-by-ear, presents the same basic concept: It allows you to check the tuning of each of the six strings of the guitar: E-A-D-G-B-E. Although a musician can play dozens of notes on a guitar, she only needs to keep the six strings in tune to ensure that every note that she plays will sound good. The following bullet points will help you remember which string is which on your guitar:

  • The lowest sound string, the one closest to your body as you hold the guitar on your lap, is the low E string.
  • The next lowest sounding string directly to the right of the low E is called the A string.
  • To the right of the A is the D string.
  • To the right of the D is the G string.
  • To the right of the G is the B string.
  • The string to the right of the B on the far right side of the guitar is called the high E string.

Tuners typically have a diagram that illustrates the points above so that you know which string it is playing. When you tune your guitar, begin with the low E string, then work your way up in the order shown in the points above. If your computer's audio card or speaker does not play a good quality sound with the tune-by-ear tuners, then you may want to purchase headphones or external speakers.

Free Online Guitar Tuner