Three simple steps
How to use the online tuner and pitch detector
- 01
Choose Use microphone and grant browser permission, or select an audio file from your device.
- 02
Play or provide a steady single note. ToolYogi estimates its fundamental frequency and nearest musical note.
- 03
Use the cents meter to see whether the note is sharp, flat or close to in tune.
What does a pitch detector measure?
A pitch detector estimates the fundamental frequency of a periodic sound. That frequency is converted to the nearest musical note using the selected A4 tuning reference.
What do cents mean?
A cent is one hundredth of a semitone. Negative cents mean the detected pitch is below the nearest note, while positive cents mean it is above. Readings within a few cents are often close enough for practical tuning, depending on the instrument and context.
Why does a tuner jump between notes?
Automatic pitch detection works best with a clean sustained monophonic sound. Chords, background noise, strong harmonics, vibrato, distortion and room reflections can cause the detected fundamental to jump.
What is A4 reference pitch?
A4 is the tuning reference used to map frequencies to note names. 440 Hz is the common modern standard, but orchestras and historical or stylistic tunings may use a slightly different reference.
Can I tune guitar or vocals with this?
Yes. Single guitar strings, piano notes, vocal tones and many other sustained sounds can work well when they fall within the supported frequency range and are reasonably clean.
Does ToolYogi record my microphone?
No. Microphone samples are analyzed locally in the browser and are not uploaded, saved or recorded by ToolYogi.
A little more clarity
Frequently asked questions
Is the online tuner free?
Yes. The current tuner and pitch detector works without an account.
Do I need to install anything?
No. Use a modern browser and grant microphone permission only if you choose live tuning.
Can it analyze an uploaded audio file?
Yes. The tool samples several parts of the file and reports the strongest stable pitch it finds.
What frequency range does it support?
The current detector targets roughly 55 Hz to 1200 Hz, covering many common instrument and vocal notes.
Can it detect chords?
This tool is designed for one stable fundamental pitch at a time. Use ToolYogi's Chord Detector for harmonic chord estimation.
Is microphone audio sent to a server?
No. Live microphone analysis happens locally in the browser.