How do I use an online guitar tuner?

To use our online guitar tuner: 1) Allow microphone access when prompted, 2) Select your tuning (Standard, Drop D, etc.), 3) Play each string one at a time, 4) The tuner shows if you're sharp (too high), flat (too low), or in tune, 5) Adjust tuning pegs until the note is centered and green.

Is this online guitar tuner really free?

Yes, our online guitar tuner is 100% free forever. No hidden fees, no premium versions, no ads. It's a free guitar tuning app that works in your browser without downloads or sign-ups.

What guitar tunings does this tuner support?

Our guitar tuner online supports over 30 tunings including: Standard (EADGBE), Drop D, Drop C, Half Step Down, Open G, Open D, DADGAD, Open E, Nashville tuning, and many more. Plus, you can create custom tunings for any string configuration.

Can I use this guitar tuner on my phone?

Yes! Our online guitar tuner works perfectly on iPhone, Android, tablets, and computers. No app download needed - just open guitartuner.io in your mobile browser for instant guitar tuning online.

Guitar Tuner

The best free online guitar tuner. Tune your acoustic, electric, or bass guitar instantly using your microphone. Accurate chromatic tuning for Standard, Drop D, Open G, and 30+ alternate tunings.

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✓100% Free Forever

✓30+ Tunings

✓Works on Any Device

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Create your own custom tuning with any number of strings and notes. Perfect for experimental tunings, extended range instruments, or unique setups.

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