Online Instrument Tuner
Allow microphone access when prompted
Tune any instrument with our high-precision chromatic tuner. Detects all 12 pitches accurately in real-time. Just play a note, and our advanced pitch detection will show you exactly where you stand. Perfect for vocalists, wind instruments, and custom tunings.
Tune your acoustic or electric guitar in Standard (E A D G B e) or Drop D tuning. Each string card lights up when your pitch is close, turning green when you're in tune.
Tune your violin in Standard tuning (G D A E). The real-time needle and stability chart help you find and hold each pitch accurately.
Tune your bass guitar in Standard tuning (E A D G). The low-frequency pitch detection is optimized to handle bass strings accurately.
Tuner Free is one of the few online tuners with dedicated support for Thai classical instruments. Tune ซออู้ (Sao U) in four tunings — ทางเพียงออ, ทางกลาง, ทางนอก, and ทางใน — as well as ซอด้วง (Sao Duang) and ซอสามสาย (Sao Sam Sai).
Yes, completely free. No ads, no subscriptions, no sign-up required. Just open the website and start tuning.
Yes. It works on all modern browsers including mobile browsers on iOS and Android. Just allow microphone access when prompted.
No. All audio processing happens entirely on your device using the Web Audio API. Your microphone audio is never uploaded anywhere, ensuring complete privacy.
Yes! Tuner Free has dedicated modes for ซออู้, ซอด้วง, and ซอสามสาย — with multiple tunings for ซออู้ including ทางเพียงออ, ทางกลาง, ทางนอก, and ทางใน.
Tuner Free uses the Pitchy pitch detection algorithm with accuracy within 1 cent. The stability chart lets you see how steady your pitch is over time.