Online Instrument Tuner

What Is the Online Multi Instruments Tuner?

The IndiPiano Online Multi Instruments Tuner is a free, universal instrument tuner that works on any device with a microphone: your phone, tablet, laptop or desktop computer. Instead of installing a separate tuner app for guitar, another for violin and another for ukulele, you get one accurate tuner in your browser that supports almost every instrument you can tune by ear. It listens to the note you play, shows the note name, the exact frequency in hertz and how many cents you are sharp or flat, and clearly tells you whether to tune up or tune down until you are perfectly in tune.

The tuner comes with 75 ready-made tunings for 9 instrument groups: guitar (22 tunings, including standard, Drop D, DADGAD, open tunings, 7-string and 8-string), bass guitar, orchestral strings such as violin, viola, cello and double bass, ukulele, banjo, the mandolin family, folk and world instruments such as bouzouki, balalaika, charango and cavaquinho, reference pitches for band and orchestra, and piano reference notes. A free Chromatic mode tunes any note on any instrument, including flute, saxophone, trumpet, harmonium, keyboard, voice and Indian instruments, and a special Indian (Sa-based) mode shows the note in sargam with just intonation for tanpura, sitar, violin and vocal practice. There is also a stretch-aware Piano mode for checking piano tuning.

You can choose between three clear displays, an analog needle with a fine scale, a 101-LED linear bar, or a professional strobe tuner, and adjust the A4 reference from 392 to 466 Hz, the transposition for B♭, E♭ and F instruments, and the microphone sensitivity for quiet or noisy rooms. A built-in reference tone lets you hear the target note, so you can tune by ear as well as by eye. The tuner is user friendly, highly accurate and optimised for every screen size and browser, and it runs completely in your browser with no download, no account and no recording or storage of your sound.

How to Tune Your Instrument Online: Step by Step

Step 1: Open the tuner and allow the microphone

Open the tuner page and press Start tuner. Your browser will ask for permission to use the microphone, so choose Allow. The tuner needs the microphone to hear your instrument, but your sound is analysed live on your own device and is never recorded, uploaded or saved. If you are inside an app such as Facebook or Instagram, open the page in your normal browser first, because these in-app browsers block the microphone.

Step 2: Stay quiet for a moment

When the tuner starts, it spends about half a second measuring the background noise of your room, and the status line asks you to stay quiet. This short calibration lets the tuner ignore fans, traffic and room hum, so it reacts only to your instrument.

Step 3: Choose a tuning mode

Choose the mode that fits your instrument. Instrument mode, the default, shows the strings of your chosen instrument and automatically detects which string you are playing. Chromatic mode recognises any note on any instrument. Manual mode locks the tuner to one target note and octave that you choose. Indian (Sa-based) mode shows the note in sargam relative to your chosen Sa. Piano mode compares your note with piano stretch tuning rather than plain equal temperament.

Step 4: Pick your instrument and tuning

In Instrument mode, open the instrument list and choose your instrument and tuning, such as Guitar Standard E A D G B E, Drop D, Violin G D A E, Ukulele G C E A, Banjo open G or Cello C G D A. The string chips appear on screen with the note name of each string. As you play, the chip of the string being tuned lights up in green, so you can see which string the tuner has detected.

Step 5: Play one string or note clearly

Play a single string or note and let it ring. Pluck or bow firmly but not too hard, and mute the other strings so only one note sounds. Hold the instrument close to the microphone of your phone or computer. The tuner shows the detected note in large letters, with the neighbouring notes on each side, the frequency in Hz to one decimal place, and the difference in cents.

Step 6: Follow the needle, bar or strobe

If the needle points to the left, or the reading says Tune up, your note is too low (flat), so tighten the string or raise the pitch. If it points to the right, or the reading says Tune down, your note is too high (sharp), so loosen the string or lower the pitch. Turn the tuning peg slowly in small steps and play the note again after each turn.

Step 7: Watch the colours

The display turns green when you are within 5 cents of the target, orange when you are within 20 cents, and red when you are further away. Flat and Sharp indicators light up on either side to show the direction.

Step 8: Hold it in tune

When your note stays within 3 cents of the target for half a second, the tuner shows “In tune ✔”, and on phones that support it, gives a short vibration. Move on to the next string and repeat until every string is in tune.

Step 9: Lock a string if needed

If the auto-detection jumps between strings, for example when a string is very far out of tune, tap the string chip you want to tune to lock the tuner to that string. Tap the chip again to return to automatic string detection.

Step 10: Use the reference tone to tune by ear

Press the reference tone button to hear a steady tone of the target note. In Instrument mode it plays the locked string, in Manual mode the chosen note, and otherwise the last detected note or A4. The button shows the exact frequency it is playing, such as “Stop tone 440.0 Hz”. Play your string together with the tone and adjust until the two sound like one note without beating.

Step 11: Adjust the settings

Open the settings to change the A4 reference pitch from 392 to 466 Hz in steps of 0.1 Hz (440 Hz is the standard), set the transposition for concert pitch, B♭, E♭ or F instruments, and set the microphone sensitivity from 1 to 10. Choose the analog, linear or strobe display, switch between the light and dark theme, and use full screen for a larger display.

Understanding Tuning and Related Music Terms

Pitch and frequency

Pitch is how high or low a note sounds, and frequency measures it in hertz (Hz), the number of vibrations per second. A higher frequency means a higher pitch. The tuner shows the frequency of your note to one decimal place, for example 110.0 Hz for the A string of a guitar.

Cents

A cent is one hundredth of a semitone, the smallest step between two piano keys. Cents measure how close you are to the perfect pitch of a note. A reading of 0 cents means perfectly in tune, -10 cents means slightly flat and +10 cents means slightly sharp. Most listeners cannot hear differences of less than about 5 cents, which is why the tuner shows green within 5 cents.

Flat and sharp

In tuning, flat means the note is lower than it should be and sharp means it is higher than it should be. To fix a flat note you raise its pitch (tighten the string), and to fix a sharp note you lower its pitch (loosen the string).

A4 reference pitch (A440)

A4 is the A above middle C, and it is the note that sets the pitch of all other notes. The international standard is A4 = 440 Hz. Some orchestras tune to 442 or 443 Hz, some baroque and early music groups use 415 Hz, and some musicians prefer 432 Hz. The tuner lets you set A4 anywhere from 392 to 466 Hz, and all notes are recalculated from your choice.

Chromatic tuner

A chromatic tuner recognises all 12 notes of the octave, not just the strings of one instrument. It is the right choice for wind instruments, keyboards, harmonium, voice and any instrument or tuning that is not in the list.

Standard tuning and alternate tunings

Standard tuning is the most common tuning of an instrument, such as E A D G B E on guitar. Alternate tunings change one or more strings to get a different sound or make certain chords easier, such as Drop D (D A D G B E), DADGAD, or open G (D G D G B D). The tuner includes many alternate tunings so you can switch without working out the notes.

Transposing instruments

Some instruments, such as the clarinet and trumpet in B♭, the alto saxophone in E♭ and the French horn in F, sound a different note from the written note. When the transposition setting matches your instrument, the tuner shows the note as written for that instrument, so it matches your sheet music.

Equal temperament and stretch tuning

Equal temperament divides the octave into 12 equal semitones and is the standard tuning of modern keyboards and fretted instruments. Pianos are usually tuned with a slight stretch, where high notes are tuned a little sharp and low notes a little flat, because piano strings have overtones that are slightly sharp. Piano mode shows how far your note is from this stretched target and how much stretch it uses compared with equal temperament.

Sa, sargam and just intonation

In Indian music, notes are named Sa, Re, Ga, Ma, Pa, Dha and Ni, and Sa can be set to any pitch to suit the singer or instrument. The 12 notes include komal (flat) re, ga, dha and ni and tivra (sharp) Ma. Indian music usually uses just intonation, where intervals are tuned to pure ratios with the drone, rather than equal temperament. In Indian mode, the tuner measures cents against just intonation from your chosen Sa and shows the octave as Mandra (low), Madhya (middle) or Tar (high).

Strobe tuner

A strobe tuner shows moving bands that drift left when the note is flat and right when it is sharp, and stand still when the note is perfectly in tune. Strobe tuners are known for their high precision and are popular with professional guitar technicians and piano tuners.

Key Features of the Online Multi Instruments Tuner

One universal tuner for almost every instrument

A single page replaces many tuner apps. Tune guitar, bass, violin, viola, cello, double bass, ukulele, banjo, mandolin, bouzouki, balalaika, charango, cavaquinho, flute, saxophone, trumpet, clarinet, harmonium, keyboard, piano, sitar, tanpura, voice and more.

75 instrument tunings in 9 groups

The instrument list includes 22 guitar tunings (standard, half step down, full step down, Drop D, Drop C, Drop B, Drop A, Double Drop D, DADGAD, open D, open D minor, open E, open G, open A, open C, open B, Nashville, 7-string, 8-string, baritone, Dobro open G and guitalele), 6 bass guitar tunings, 10 orchestral string tunings (violin, 5-string violin, fiddle cross tunings, viola, cello, double bass including 5-string and solo tuning, and viola da gamba), 4 ukulele tunings (standard, low G, D tuning and baritone), 8 banjo tunings (5-string open G, C, double C, sawmill, open D, tenor, Irish tenor and plectrum), 6 mandolin family tunings, 11 folk and world tunings (tenor guitar, Irish bouzouki, Greek bouzouki, balalaika, cuatro, cavaquinho, charango and bandurria), 5 reference pitches (A4, concert B♭, C, E♭ and F) and 3 piano reference sets.

Five tuning modes

Instrument mode with automatic string detection, Chromatic mode for any note, Manual mode for one locked target note and octave from 0 to 8, Indian Sa-based mode with sargam and just intonation, and stretch-aware Piano mode.

Automatic string detection with string lock

In Instrument mode, the tuner recognises which string you are playing and lights its chip in green. Tap a chip to lock that string, and tap again to return to auto detection.

Three tuner displays

Choose an analog needle with a ±50 cent main scale and a ±10 cent fine scale for precise final tuning, a linear bar of 101 LEDs, or a three-band strobe display for the highest visual precision.

High accuracy pitch detection

The tuner uses an advanced pitch detection method designed for musical instruments, with median smoothing over several readings for a steady display. It detects notes from 20 Hz to 4,500 Hz, from the lowest bass strings to high flute and piano notes, and shows the frequency to 0.1 Hz and the cents to 0.1 cent.

Clean microphone input

The tuner turns off the phone’s echo cancellation, noise suppression and automatic gain control, which can distort pitch, and filters the input to the musical range. It also measures your background noise at the start so that room noise does not trigger false readings.

Clear tuning guidance

Colour zones (green within 5 cents, orange within 20 cents, red beyond), Flat and Sharp indicators, and simple instructions such as Tune up and Tune down make tuning easy for beginners, while the exact cents and Hz readings satisfy professionals.

In tune confirmation

The tuner confirms “In tune ✔” when your note holds within 3 cents for half a second, with a short vibration on supported phones.

Reference tone

Hear a clean reference tone at the target note to tune by ear, check your ear training, or give a pitch to a singer or ensemble.

Adjustable A4, transposition and sensitivity

Set A4 from 392 to 466 Hz, choose concert pitch or B♭, E♭ and F transposition, and set the sensitivity from 1 to 10 to suit quiet instruments or noisy rooms.

Optimised for all devices

The tuner adapts to every screen from small phones to large monitors, keeps the screen awake while you tune, pauses when you switch tabs to save battery, offers light and dark themes and full screen, and works in all modern browsers. Nothing is stored, so every visit starts clean.

What You Can Do With the Online Tuner

Tune a guitar in standard or alternate tuning

Choose Guitar Standard to tune E A D G B E, or pick Drop D, DADGAD, open G, half step down and many more. Acoustic guitar can be tuned through the microphone, and electric guitar works well when played unplugged close to the mic or through an amplifier.

Tune bass guitar

The tuner detects low notes down to 20 Hz, so it handles 4-string, 5-string and 6-string bass, including the low B string.

Tune violin, viola, cello and double bass

Tune orchestral strings to the standard fifths, try fiddle cross tunings for folk music, or use the A4 setting to match an orchestra at 442 Hz.

Tune ukulele, banjo and mandolin

Use the ukulele, banjo and mandolin tunings to tune standard, low G, baritone, open G, tenor and other popular setups in seconds.

Tune folk and world instruments

Tune bouzouki, balalaika, cuatro, cavaquinho, charango, bandurria and tenor guitar with their own tunings, without searching for the notes.

Tune wind and brass instruments

Use Chromatic mode with the B♭, E♭ or F transposition to tune trumpet, clarinet, saxophone and French horn, and check your intonation on long notes.

Tune Indian instruments and practise sargam

Use Indian mode to set Sa and tune tanpura, sitar, sarod, violin, swarmandal or harmonium relative to Sa, or to check your singing of sargam notes in just intonation.

Check piano and keyboard tuning

Use Piano mode and the piano reference sets to check whether a piano is in tune, see the stretch of each note, or check a harmonium or electronic keyboard.

Train your voice and ear

Sing a note and see how close you are, or play the reference tone and try to match it with your voice. This is a simple way to practise pitch accuracy.

Tune a band or ensemble

Use the reference pitches to give the same A or B♭ to every player, and set A4 to the pitch your group uses.

Tips for Accurate Tuning

Tune in a quiet place

Background noise, other instruments and people talking can confuse any tuner. Tune in a quiet room, and stay silent during the short calibration when the tuner starts.

Play one note at a time

Mute the other strings with your hand so only the string you are tuning rings. Several ringing strings make the reading jump.

Tune up to the note

If a string is sharp, loosen it a little below the note and then tighten it up to pitch. Tuning up to the note helps the string hold its tuning better.

Let the note settle

The first moment of a plucked note is often slightly sharp. Let the note ring for a second and read the tuner after the attack.

Use the fine scale for the last step

On the analog display, the inner ±10 cent scale shows tiny differences. Use it for the final adjustment once you are close.

Lock the string when it is far out

If a new string or a very loose string is far from its note, the tuner may detect a different string. Tap the correct string chip to lock it.

Adjust the sensitivity

Raise the sensitivity for soft instruments such as nylon guitar or ukulele, and lower it in noisy places so the tuner ignores the background.

Check the A4 reference

If your instrument sounds out of tune with others even when the tuner shows green, check that A4 is set to the same pitch as the group, usually 440 Hz.

Tune again after a few minutes

New strings stretch and temperature changes affect tuning. Play for a few minutes, then check the tuning again.

Troubleshooting

The Online Multi Instruments Tuner is already well optimised and adjusts itself to all modern browsers, devices and operating systems, including Chrome, Edge, Safari, Firefox and Opera on Windows, macOS, Android, iPhone, iPad and Linux, so in most cases you will not face any issues. Still, every browser, device and microphone is a little different, so if something does not work as expected, please check the points below.

The tuner says the microphone is blocked

You may have chosen Block when the browser asked for the microphone. Click the lock or settings icon next to the web address, allow the microphone for this site, and reload the page. On phones, also check that your browser has microphone permission in the phone’s system settings.

The tuner says no microphone was found

Make sure your device has a working microphone and that no other app, such as a video call, is using it. On a desktop, connect a headset or USB microphone and select it in your system sound settings.

The microphone does not work inside Facebook, Instagram or another app

In-app browsers often block the microphone. Use the menu in the app to open the page in Chrome, Safari or your default browser.

The tuner says the page must be secure

Browsers only allow microphone access on secure pages that start with https. Open the tuner from the official IndiPiano address so that the secure connection is used.

The needle jumps or does not settle

Play only one string, mute the others, move closer to the microphone and reduce background noise. Try lowering the sensitivity in a noisy room, or lock the string chip. Very old strings can also give an unsteady pitch.

The tuner does not react to my instrument

Raise the sensitivity, play a little louder and bring the instrument closer to the microphone. Make sure the device volume and microphone are not muted, and check that the input level meter moves when you play.

The tuner shows the wrong octave or wrong string

Strong overtones can sometimes confuse detection, especially on low strings. Lock the correct string chip in Instrument mode, or use Manual mode with the correct note and octave.

The note name does not match my sheet music

If you play a transposing instrument, set the transposition to B♭, E♭ or F. If you play guitar, bass or piano, keep it on concert C.

I cannot hear the reference tone

Turn up your device volume, check that your phone is not in silent mode, and tap the reference tone button again. On iPhone and iPad, the ring or silent switch can mute web audio.

The tuner stopped when I switched apps

To save battery and protect your privacy, the tuner stops listening when the tab is hidden. Return to the page and press start again.

Frequently Asked Questions

Is the online tuner free?

Yes. The tuner is completely free, with no account, no download and no limit on use.

Which instruments can I tune with this tuner?

Almost any instrument. There are 75 ready-made tunings for guitar, bass, violin, viola, cello, double bass, ukulele, banjo, mandolin, folk and world instruments, band reference pitches and piano. Chromatic mode tunes any other instrument, including wind, brass, keyboard, harmonium, Indian instruments and voice.

How accurate is the online tuner?

The tuner shows the frequency to 0.1 Hz and the pitch to 0.1 cent, uses smoothing for a steady reading, and confirms “In tune” within 3 cents. With a quiet room and a good microphone, this accuracy is more than enough for professional tuning.

Does the tuner record or save my sound?

No. The sound is analysed live in your browser, on your own device, and is never recorded, uploaded or stored.

How do I tune a guitar to Drop D?

Choose Instrument mode, open the instrument list and pick Guitar Drop D. Tune the low E string down until the tuner shows D in green, then check the other five strings.

Can I tune to 432 Hz or 442 Hz?

Yes. Open the settings and set the A4 reference to any value from 392 to 466 Hz. All notes and strings are recalculated from your setting.

Can I tune a B♭ trumpet, E♭ alto saxophone or F horn?

Yes. Set the transposition to B♭, E♭ or F so the tuner shows notes as written for your instrument.

Can I tune Indian instruments or sing sargam?

Yes. Indian mode lets you choose Sa from C to B, shows the detected note as sargam with komal and tivra notes and the octave (Mandra, Madhya, Tar), and measures cents in just intonation, which suits tanpura, sitar and vocal practice.

Can I tune a piano with this tuner?

You can check a piano’s tuning with Piano mode, which accounts for stretch tuning, and with the piano reference sets. Full piano tuning needs special tools and skill, so a professional tuner is recommended for major work.

What is the difference between the analog, linear and strobe displays?

All three show the same reading in different ways. The analog needle is familiar and has a fine scale, the linear bar is easy to read at a glance, and the strobe display shows tiny pitch differences as moving bands for the highest precision.

Does the tuner work on iPhone and Android?

Yes. The tuner works in Safari and Chrome on iPhone and iPad and in Chrome and other browsers on Android, as well as on Windows, macOS and Linux computers.

Why does the screen stay on while tuning?

The tuner keeps your screen awake while it is listening, so the display does not turn off in the middle of tuning. It releases this when you stop the tuner.