Guitar Tuner
Tune a guitar, bass, ukulele, violin, viola or cello with your microphone — the string is detected automatically, plus a reference drone that keeps sounding.
Microphone → Pitch
Why it is safe to use
- Runs entirely in your browser; nothing you enter is sent to a server.
- Free, with no account and no sign-up.
- Installable as an app; a tool you have opened keeps working offline.
- Open source (MIT) on GitHub.