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Instrument Tuner
Chromatic tuner for guitar, bass, ukulele, violin and more, live from your microphone.
Free, no uploads, no sign-up. Runs 100% in your browser.
How Instrument Tuner works
Sound from the microphone is read about 15 times a second and the pitch is found with the YIN method, then shown as a note with how many cents it is flat or sharp. Nothing is recorded or sent anywhere.
Input: Microphone.
How to use Instrument Tuner
- Pick your instrument, or Chromatic for any note.
- Press Start tuner and allow the microphone.
- Play one string and turn the peg until the needle is in the middle.
Tips
- Press a reference note to hear the target pitch.
- Change A4 if your band tunes to 442 or 432 Hz.
Instrument Tuner FAQ
- Are my files uploaded?
- No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
- Is it free? Are there limits or watermarks?
- Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
- Does it work offline?
- Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.
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