Online Guitar Tuner (Microphone)
Tune your guitar with your microphone.
Standard, drop D, half step down, open G, bass, ukulele or chromatic. Free, nothing recorded.
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Guitar standard (E A D G B E)
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Press Start and allow the microphone
The microphone sound is analysed on your device and never recorded or sent anywhere.
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How it works
Start the tuner
Press Start tuning and allow the microphone.
Pick your tuning
Standard, drop D, half step down, open G, bass, ukulele or chromatic.
Tune each string
Play one string, let it ring and turn the peg until the needle is in the centre and the note turns green.
About the Online Guitar Tuner (Microphone)
Completely free: free account, no credits, no limit. It runs in your browser, so your audio stays on your device.
The online Guitar Tuner listens through your microphone and shows the nearest string, its frequency and how many cents sharp or flat you are. Within ±5 cents it turns green.
Choose standard tuning (E A D G B E), drop D, half step down, open G, 4-string bass, ukulele (G C E A) or chromatic mode for any instrument. Tap a string to hear its reference note, and set A4 if your band tunes to 432 or 442 Hz.
Pitch is detected with the YIN algorithm on your device. The sound is analysed live and never recorded or sent anywhere.
What you can use it for
- ✓Tune an acoustic or electric guitar without a clip-on tuner
- ✓Tune a bass or ukulele
- ✓Check the tuning of any instrument in chromatic mode
- ✓Tune by ear with the reference tones
Step-by-step guide: How to Tune a Guitar Online Without a Tuner (Free)
Frequently asked questions
How do I use it?
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Press Start tuning and allow the microphone. Play one string at a time and let it ring. If the needle is left of centre, tighten the string; right of centre, loosen it.
Does it work on a phone?
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Yes, in Chrome or Safari. Allow microphone access when asked.
Can it tune an electric guitar?
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Yes. Play it through an amp or close to the microphone; unplugged electric strings are quiet but usually still work in a quiet room.
Is my sound recorded?
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No. The microphone signal is analysed in real time on your device and nothing is stored or uploaded.
Is it really free?
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Yes. It is completely free, with a free account: no limit and no watermark. It runs in your browser, so your audio stays on your device.