Popular guitar tunings
Each tuning has its own page with the tuner preloaded, step-by-step instructions and a frequency chart
Guides
How it works
- Allow the microphoneThe first time you press Start tuning, your browser asks for microphone access. Allow it.
- Play one notePlay a single string or note at a time, keep the instrument close and reduce background noise.
- Tune with the needleA left needle means flat, right means sharp; the central green zone means in tune.
FAQ
What is a chromatic tuner?
A chromatic tuner is not tied to one instrument. It maps whatever it hears to the nearest note of the 12-tone equal-tempered scale and shows the octave, the frequency and how many cents sharp or flat you are. Use it for guitar, ukulele, wind instruments, harmonica or your voice; for string-by-string tuning, the dedicated instrument tuners are quicker.
How low and how high can this chromatic tuner detect?
It detects roughly 27.5 Hz (A0, the lowest piano key) up to 4186 Hz (C8). Phone microphones pick up notes below about 40 Hz weakly, so hold the phone close to the source. The reading waits for a few stable frames before it is shown, so the needle does not jump around.
Are these tools free or do I need to install something?
Both free and install-free — everything runs directly in your browser.
Is my microphone audio uploaded?
No. Web Audio analyzes sound on your device in real time; nothing is recorded, uploaded or stored.
Why do acoustic and electric guitar share one tuner?
Both use the same standard tuning (E-A-D-G-B-E). Open the guitar tuner and pick the preset you need.
Does it work on a phone?
Yes. iOS Safari and Android Chrome are supported; a quiet room gives the most reliable reading.
