Guitar Tuner
Tune your guitar or any instrument from your microphone with live pitch detection and cents deviation.
Autocorrelation pitch detection (gated on level, ~8 checks/sec) — chromatic by default, or lock a guitar string to judge cents against that fixed pitch. Green band = within ±5 cents.
About Guitar Tuner
Tune your guitar or any instrument from your microphone with live pitch detection and cents deviation.
Guitar Tuner uses your browser's built-in audio capabilities to test, record or generate sound with real-time visual feedback.
How to Use Guitar Tuner
- Allow microphone or speaker access when the browser asks.
- Follow the on-screen meter, waveform or controls.
- Perform the test or action you came to do.
- Read the results or download any recording.
Key Features
- Real-time meters and waveforms for clear feedback.
- Uses your browser's native audio APIs — no plugins.
- Nothing is recorded or uploaded unless you choose to download it.
Frequently Asked Questions
Why does Guitar Tuner ask for microphone permission?
Only tools that actually listen need microphone access — and permission is requested by your browser, used locally, and never sent to a server.
Is Guitar Tuner free to use?
Yes. Guitar Tuner is completely free with unlimited use — no account, download or payment required.
Is my data uploaded to a server?
No. Guitar Tuner runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.
Does Guitar Tuner work on mobile?
Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.
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