Is this tuner really free?

Yes. No account, no ads, no limits.

Is my audio recorded?

No. The sound is analysed in your browser and never uploaded or stored.

Yes, in any modern mobile browser. Hold the phone close to the sound hole or amp.

Yes. Use the amp’s speaker or a clean tone, and play one string at a time.

The standard reference pitch. All the notes in the table are based on it.

Free, in your browser, with any microphone. No account and no app to install. Your audio never leaves your device.

Instrument

Standard tuning · tap a string to hear it, or just play

110.00 HzMicrophone off

Asks for microphone access once. Sound is analysed on your device and never recorded.

How to tune

1Allow the microphone. Any built-in laptop or phone mic works. Get close to the instrument in a quiet room.
2Play one open string. The tuner finds the nearest note and shows which string it thinks you played.
3Turn the peg until the needle is centred. Left of centre is flat, tighten. Right is sharp, loosen. Green means in tune.

Reference

String	Guitar	Hz	Bass (4-string)	Hz
6 (thickest)	GuitarE2	Hz82.41	Bass (4-string)E1	Hz41.20
5	GuitarA2	Hz110.00	Bass (4-string)A1	Hz55.00
4	GuitarD3	Hz146.83	Bass (4-string)D2	Hz73.42
3	GuitarG3	Hz196.00	Bass (4-string)G2	Hz98.00
2	GuitarB3	Hz246.94	Bass (4-string)–	Hz
1 (thinnest)	GuitarE4	Hz329.63	Bass (4-string)–	Hz

In tune? Now play something

Musicalio turns sheet music, even a photo of a printed page, into notes and tab, then waits for each note you play.

Is this tuner really free?: Yes. No account, no ads, no limits.
Is my audio recorded?: No. The sound is analysed in your browser and never uploaded or stored.
Does it work on my phone?: Yes, in any modern mobile browser. Hold the phone close to the sound hole or amp.
Can I tune an electric guitar?: Yes. Use the amp’s speaker or a clean tone, and play one string at a time.
What is A = 440 Hz?: The standard reference pitch. All the notes in the table are based on it.

Tuned up? Bring your sheet music.