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GuitarTuna

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Online guitar tuner

guitar headstock with tuning pegs

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How to tune your guitar online

Press “Tap to tune” to start the tuner and allow microphone access when prompted. Pluck one string clearly and let it ring. The tuner displays the detected note and shows whether you are sharp or flat. Turn the tuning peg in small steps, then pluck again to recheck. When the indicator centers and the note matches, move to the next string. After tuning all strings, check them once more in reverse order to confirm stable tension.
How to tune a guitar online using the GuitarTuna tuner

Switch string counts and keep the right targets

Use the string selector to switch between 6 string, 7 string, and 12 string setups without leaving the page. The note list updates to the standard tuning for the instrument you chose, so you always know the target pitches before you play. If your guitar uses an alternate tuning, start from the closest preset and tune each string to your desired note. Save the setting in your browser for quick return next time you visit.
Switching string counts and tuning targets for guitar

Get better accuracy and tune more consistently

Accurate tuning depends on a clean signal. Play close to your device, reduce background noise, and pluck with a steady attack. If the reading jumps, try a different string position or angle the microphone toward the sound hole. Guitars drift with temperature changes, humidity, and playing time, so a quick check before each session is wise. If you cannot use a microphone, use the reference tones to tune by ear when you need a backup.
Tips for accurate and consistent guitar tuning

Frequently asked questions

How do I use the online guitar tuner?

To use the online guitar tuner, click the Start Tuner button and allow microphone access. Pluck a string on your guitar, and the visual interface will show you if the note is sharp, flat, or perfectly in tune in real-time.

Is this guitar tuner free to use?

Yes, our guitar tuner is 100% free. You can tune your strings (E2, A2, D3, G3, B3, E4) as many times as needed directly in your browser without any hidden costs or subscriptions.

What are the standard tuning notes for guitar?

The standard tuning for a guitar is E2, A2, D3, G3, B3, E4. Our tuner is pre-calibrated to these exact frequencies to ensure your guitar sounds professional every time you play.

How accurate is this online guitar tuner?

This tuner uses high-precision audio algorithms to detect frequencies within 0.1 cents of the target pitch. It is accurate enough for professional performers and beginner guitar players alike.

Can I use this guitar tuner on my phone or tablet?

Yes! This page is fully mobile-optimized. You can tune your guitar on the go using your smartphone's built-in microphone without needing to download a separate app.