Understanding the result
The nearest note and cents value show pitch relative to A4 = 440 Hz. Negative cents are flat, positive cents are sharp, and zero is the target.
Audio and music
Chromatic Tuner
Play one note and watch whether it is flat or sharp against the nearest equal-tempered pitch. Keep the sound steady for the clearest reading.
Detected note—Waiting for microphone
TuningA4 = 440 Hz
Flat—Sharp
Play one note at a time in a quiet room. A4 reference: 440 Hz.
This tuner uses A4 = 440 Hz and works locally in your browser.
How to use this tool
- Allow microphone access.
- Play a single sustained note.
- Adjust until the cents reading approaches zero.
Troubleshooting
- Play one sustained note near the microphone and mute neighboring strings.
- If the needle jumps, reduce background sound and try a gentler attack so harmonics do not dominate.
Browser and device limitations
The tuner depends on browser audio and microphone quality and is not a substitute for calibrated tuning equipment.
RELATED TOOLS
All toolsKeep checking
Voice RecorderRecord audio in your browser and download the file.Open toolOnline DictaphoneRecord a voice note and view a live transcript when supported.Open toolTone GeneratorPlay a steady tone at a frequency and volume you choose.Open toolPitch DetectorFind the frequency and closest musical note from your microphone.Open toolMetronomeKeep time with an adjustable beat and accent.Open toolGuitar TunerTune a six-string guitar in standard E A D G B E tuning.Open tool
Common questions
What does cents mean?
A cent is one hundredth of a semitone. Negative is flat; positive is sharp.
Can I tune any instrument?
Yes, if the microphone picks up one clear note at a time within the supported frequency range.
Why does the tuner choose the next note?
Once the pitch crosses the midpoint between semitones, the nearest-note label changes.