Check a Note With the Online Tuner
This online tuner listens to one steady note through your microphone and compares it with the nearest chromatic pitch. It shows the note name, its frequency in hertz, and the cents difference from the target, so you can decide whether to raise or lower the pitch.
Use the tuner with guitar, ukulele, violin, bass, viola, cello, or another pitched instrument. It is made for one clear note, not a chord, voice, or complete recording. Microphone processing stays in your browser during the tuning session. For an audio file, use the MusicCreator online pitch detector.
- Input
- Live microphone
- Reference
- A4 = 440 Hz
- Display
- Note, Hz, cents
See What to Change in Each Note
A useful tuning reading tells you which note is sounding, how far it is from the target, and whether to move up or down. The online tuner keeps those three details together while you adjust the instrument.
Read Flat or Sharp
Negative cents show a flat note and positive cents show a sharp note, so the next adjustment has a clear direction.
Use Your Microphone
Start a live reading in the browser without uploading a recording or installing a separate application.
Tune Different Instruments
The chromatic detector reads stable single notes across its supported frequency range instead of limiting the display to one instrument preset.
Tune One Clear Note at a Time
A quiet space and a steady note help the online tuner settle on the pitch you want to adjust. Repeat the same short check for every open string or note that needs tuning.
- 01
Start Listening
Select Start tuning and allow microphone access when your browser asks.
- 02
Play a Steady Note
Pluck one string or sustain one clear note, then let it ring while the tuner reads the pitch.
- 03
Adjust by the Cents Reading
Raise or lower the pitch in small steps until the cents indicator reaches the green center.
Read a Stable Pitch Clearly
The chromatic tuner keeps the detected note, pitch direction, in-tune state, and microphone control close together for a quick instrument check.
Identify the Nearest Note
Play one sustained instrument note and the tuner maps its detected frequency to the nearest chromatic note and octave.
Start a Live ReadingUse the Cents Direction
A negative cents value means the note is flat; a positive value means it is sharp. The needle shows the direction and size of the adjustment.
View a Flat ReadingConfirm an In-Tune Note
When the detected pitch is within five cents of the target, the center marker and status turn green to show that the note is in tune.
View the In-Tune StateControl Microphone Listening
Start and stop the live reading with one control. The tuner releases the microphone track when you stop tuning or leave the page.
Open Tuner ControlsRead Flat, In Tune, and Sharp
The nearest note sits at zero cents. A cents value below zero means the pitch is flat; a value above zero means it is sharp. Use the reading for small, controlled changes.
Negative cents: raise the pitch.
Within five cents of the target note.
Positive cents: lower the pitch.
Check Standard Tuning Notes by Instrument
Use these standard tuning notes as a reference, then check each open string with the chromatic tuner. The letter is the note name and the number is its octave, so E2 is a lower E than E4. Notes run from the lowest string to the highest unless noted.
These note groups are starting references, not the full range of the tuner. The chromatic detector reads stable single notes from about 40 to 2,000 Hz, including alternate tunings and other pitched instruments in that range. For an uploaded song, check its tonal center with the MusicCreatorsong key detector.
Guitar
E2 - A2 - D3 - G3 - B3 - E4
Bass
E1 - A1 - D2 - G2
Ukulele
G4 - C4 - E4 - A4
A4 = 440 Hz
The tuner uses A4 at 440 Hz as its pitch reference.
G3 - D4 - A4 - E5
Standard open-string reference from low to high.
C3 - G3 - D4 - A4
Standard open-string reference from low to high.
C2 - G2 - D3 - A3
Standard open-string reference from low to high.
Tune More Than One Instrument
A chromatic tuner is not limited to one instrument. It identifies the nearest note from the chromatic scale, so you can check standard or alternate open strings with the same microphone reading.
Check Guitar Strings
Pluck one open string, mute the others, and adjust the peg after the note settles. For Standard, Drop D, DADGAD, and other six-string presets with reference notes, use the dedicated MusicCreatoronline guitar tuner.
Tune a Ukulele
Check G, C, E, and A one at a time, including a common re-entrant high-G setup. The same note and cents display gives each string a clear target.
Check Bass Open Strings
Use the chromatic display for E, A, D, and G. Let a lower string sustain long enough for the tuner to settle before making an adjustment.
Tune Violin, Viola, or Cello
Sustain one open string in a quiet room to reduce competing resonance, then use the same note-and-cents check for violin, viola, or cello.
Use the Online Tuner Before You Play
The same note, frequency, and cents display helps players prepare an instrument for practice, a lesson, rehearsal, or a recording take.
Beginning Players
See a note name and cents direction while making small peg adjustments.
Practicing Musicians
Check open strings or a sustained note before practice, then use the MusicCreatortap tempo toolwhen the same session also needs a steady BPM.
Teachers and Students
Use the note name, hertz, and cents as a shared pitch reference during a lesson.
Rehearsal and Recording
Confirm a stable starting pitch before playing with other musicians or recording a part.
Prepare an Instrument for the Next Session
A short online tuner check gives every player a clear starting pitch before the first exercise, rehearsal song, or recorded take.
Check the Notes You Will Play
Tune open strings or a sustained note before an exercise so the instrument matches the pitch you plan to practice.
Start From the Same Pitch
Check each instrument against the same A4 = 440 Hz reference before the group starts playing.
Check Pitch Before a Take
Confirm the note and cents reading before recording a performance, then make another quick check when you need one.
Help the Tuner Hear One Note
Play one sustained note, let the opening attack settle, and mute nearby strings or sound sources while you adjust. This gives the online tuner a cleaner pitch to match and keeps the note, frequency, and cents reading relevant to the sound you are making.
Microphone access begins only after you select Start tuning. The tuner releases the microphone when you stop, disconnect the device, hide the tab, or leave the page.
Open Tuner Controls
Online Tuner FAQ
Is this online tuner free to use?
Yes. The online tuner runs in a supported browser and listens through your microphone after you choose Start tuning. You do not need to install a separate app.
How do I use this tuner for strings?
Choose Start tuning, allow microphone access, then play one open string. Adjust it while the tuner shows the nearest note and cents, then repeat for the remaining strings. Use the dedicated guitar tuner for six-string tuning presets and reference notes.
Can I use this tuner for ukulele, violin, bass, viola, and cello?
Yes. Play one clear note at a time and the chromatic tuner can read the standard notes used by ukulele, violin, bass, viola, cello, and other pitched instruments within its supported range.
What is a chromatic tuner?
A chromatic tuner identifies the nearest note from all 12 pitch classes, then shows whether the sound is flat, sharp, or within the in-tune range.
When should I retune an instrument?
Check tuning before practice, rehearsal, recording, or a performance. Check again after travel, temperature changes, fitting new strings, or extended playing, using one sustained note for each reading.
Start a Clear Tuning Check
Open the online tuner, play one steady note, and follow the cents reading until the display reaches the in-tune center.
Start Tuning