Online Tuner: Guitar, Bass Guitar & Ukulele Tuner
🎸 Here's a free and simple online instrument tuner that you can use to tune
an electric guitar, acoustic guitar, bass guitar or a ukulele.
Just click on the Start Tuner button to initiate microphone
access and you're ready to start tuning your instrument!
Not sure how to use the tuner?
Read here for simple instructions.
Also check out the tool for guitar scales,
guitar chords and the virtual
guitar fretboard.
🎙️ If you want to tune a different instrument, check out the
chromatic tuner or, for your voice, check out
the voice tuner.
Acoustic Guitar
Electric Guitar
Bass Guitar
Ukulele
👂 Listening for a 1st clear pitch...
Tuning: →
Tuning: →
Tuning: →
How to use this online guitar, bass guitar and ukulele tuner
This free online guitar and ukulele tuner makes it easy to play the different strings on your instrument and adjust their tuning so that they sound just right.
The tuner uses your device's microphone, so the clearer the sound the better. Try to tune your instrument in a quiet room and place your instrument close to your microphone. Start by activating the tuner using the Start Tuner button. This will trigger the browser to ask for permission to use your device's microphone.
Next, select your instrument between acoustic guitar, electric guitar, bass guitar or ukulele. Now play each string of your instrument and the indicator will tell you if that string is in tune, too low or too high. The tuner automatically detects which string you're playing.
The indicator turns green when the registered pitch is within 3 Hz of the correct pitch, and a green checkmark appears when the pitch is within 1 Hz of the correct pitch.
Standard Tuning
This online guitar and ukulele tuner uses standard tuning for each of the available instruments:
- Acoustic & Electric Guitar: E A D G B E
- Bass Guitar: E A D G
- Ukulele: g C E A
You can get in touch and let me know if you'd like me to consider adding more instrument tunings to this online tuner.
Note also that this tuner uses a base frequency of 440 Hz, where A4 tunes at 440 Hz, which is the standard in equal temperament tuning.

Hey 👋, I'm Seb and I'm creating muted.io
I need your help! If you have a few dollars to spare, I would be incredibly grateful if you could donate to support the development of muted.io. 🙏
I estimate that I would be able to fully support myself if only about 3% of the site's visitors made a one time $4 donation.
My ultimate goal is to be able to focus my time on creating more free musical tools, and your donation will go directly towards making that goal a reality. 🙌
- Seb, ✌️ + ❤️