Free Online Chromatic Tuner
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.
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Accurate: Precision within 1 cent using the
Pitchy algorithm.
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Fast: Real-time response with visual waveform
and stability chart.
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Private: All audio stays on your device.
Nothing is sent to any server.
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Free: No ads, no subscriptions, no sign-up
required.
Supported Instruments
Guitar Tuner
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.
Violin Tuner
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.
Bass Tuner
Tune your bass guitar in Standard tuning (E A D G). The
low-frequency pitch detection is optimized to handle bass
strings accurately.
Thai Instrument Tuner (ซออู้, ซอด้วง, ซอสามสาย)
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).
Frequently Asked Questions
Is Tuner Free really free to use?
Yes, completely free. No ads, no subscriptions, no sign-up
required. Just open the website and start tuning.
Does Tuner Free work on mobile?
Yes. It works on all modern browsers including mobile browsers
on iOS and Android. Just allow microphone access when
prompted.
Does my audio get sent to a server?
No. All audio processing happens entirely on your device using
the Web Audio API. Your microphone audio is never uploaded
anywhere, ensuring complete privacy.
Can I tune Thai instruments with Tuner Free?
Yes! Tuner Free has dedicated modes for ซออู้, ซอด้วง, and
ซอสามสาย — with multiple tunings for ซออู้ including
ทางเพียงออ, ทางกลาง, ทางนอก, and ทางใน.
How accurate is the tuner?
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.