Online Piano Keyboard

What Is the Online Virtual Piano?

The IndiPiano Online Piano is a free virtual piano that you can play directly in your web browser with your computer keyboard, mouse, touch screen or a real MIDI keyboard. It starts with a rich, realistic Acoustic Grand Piano, and with one tap you can switch to a huge library of real recorded instrument sounds covering the full General MIDI family: pianos, electric pianos, organs, guitars, basses, violins, cellos, string ensembles, choirs, trumpets, saxophones, flutes, synth leads, synth pads, sound effects and Indian and world instruments such as sitar and shehnai. Every instrument is built from real audio samples, not cheap beeps, so the online piano sounds natural and musical on any device.

While you play, the note visualizer shows your music in two beautiful ways. Piano particles sends glowing bars of coloured light and sparkles rising from each key you press, and Music sheet writes your notes live on a grand staff with treble and bass clefs, so you can see exactly what you played in real musical notation. A live display shows the notes you are holding and even names the chord, such as C, Am7 or G/B. You can record your performance for up to 10 minutes, play it back, select any part on the timeline, and download it as a high quality MP3 or WAV audio file with your chosen bitrate, sample rate, stereo or mono, normalising, fades and silence trimming.

The piano also includes 16 studio-style sound controls (reverb, room size, echo, bass, mid, treble, warmth, stereo width, compressor and more), nine sound presets such as Concert hall, Cathedral and Lo-fi radio, a sustain pedal, touch velocity, transpose, a built-in metronome, and a choice of 25, 37, 49 or 61 keys. The sound samples are carefully optimised to sound great while staying light, so they load quickly on phones, tablets and computers in any browser, even on slower connections. Everything runs online, in your browser, with no download, no plug-in and no sign-up, which makes the IndiPiano Online Piano one of the most complete and accurate virtual pianos available on the web.

How to Play the Online Piano: Step by Step

Step 1: Wait for the sounds to load

When the page opens, the piano loads the Acoustic Grand Piano. A round progress ring shows the loading percentage, and the status reads Loading. Playing unlocks as soon as all the notes are loaded, and the status changes to Ready. Each instrument has 37 sampled notes that are downloaded in parallel, starting from the middle of the keyboard, so loading usually takes only a moment.

Step 2: Play with your mouse or touch screen

Click or tap any key to play it. You can press several keys at once on a touch screen to play chords, and you can drag your finger or mouse across the keys to glide from note to note. When Touch velocity is on, pressing lower down on a key plays a louder note and pressing near the top plays a softer note, just like playing harder or softer on a real piano.

Step 3: Play with your computer keyboard

Your computer keyboard plays 37 notes across three rows. The bottom row Z X C V B N M plays the white keys of the first octave, with S D G H J for the black keys. The row Q W E R T Y U plays the next octave, with 2 3 5 6 7 for the black keys. The keys I O P [ ] then continue with 9 0 = A K L ; and ‘ for the third octave. Turn on the Play guide panel to see a clear picture of which computer key plays which note. Use the left and right arrow keys to move the computer keyboard down or up by one octave.

Step 4: Connect a MIDI keyboard

For the best playing experience, plug in a USB or Bluetooth MIDI keyboard and press the MIDI button at the top of the piano, then choose Allow when your browser asks. The piano connects automatically, shows the name of your device, and supports note velocity and the sustain pedal of your keyboard. If you have several MIDI devices, you can switch each one on or off. When you choose 49 or 61 keys, the piano offers to connect your MIDI keyboard in one click.

Step 5: Choose an instrument sound

Press the instrument name above the keyboard, for example Acoustic Grand Piano No. 001, to open the instrument list. The sounds are grouped into families such as Piano, Organ, Guitar, Strings, Brass and Ethnic. Type in the search box to find a sound quickly, such as “violin” or “sitar”, and use the arrow keys and Enter to choose. You can also step through every sound with the previous and next buttons beside the name. The colour theme of the piano changes with each instrument family.

Step 6: Use the sustain pedal

The Sustain pedal button sets whether notes ring out after you let go of the key. When it is On, notes fade naturally like a real piano with the pedal down. When it is Off, notes stop as soon as you release the key. You can also hold the Space bar on your computer keyboard, or press the sustain pedal of your MIDI keyboard, to hold notes while it is pressed.

Step 7: Watch the note visualizer

Choose Piano particles to see coloured light bars rise from the keys you press, with sparkles that grow with how hard you play, or choose Music sheet to see your notes appear on a scrolling grand staff. The display above the keyboard shows the notes you are playing and the chord name. You can collapse the visualizer to make more room for the keyboard.

Step 8: Change the piano settings

Open the Piano panel to choose 25, 37, 49 or 61 keys, set the key labels to show computer keys, note names or nothing, turn touch velocity on or off, move the keyboard octave, set the master volume, transpose up or down by semitones, switch the sustain pedal, and start the built-in metronome with 2 to 8 beats per bar and a tempo from 30 to 260 BPM.

Step 9: Shape the sound

Open the Sound panel to choose a preset such as Natural, Concert hall, Bright studio, Warm vintage, Cathedral, Small room, Ambient echo, Lo-fi radio or Dry and close, or adjust the 16 knobs yourself. Drag a knob up or down to change it, double-click to reset it, or select it and use the arrow keys. Press Reset to go back to the Natural sound.

Step 10: Record your playing

Open the Record panel and press Record, then play. The timeline shows your notes as you play them and the timer counts the recording time. Press Stop recording when you are finished, and the piano tells you how many notes were saved. Press Play to hear your take, click on the timeline to move the playhead, or drag on the timeline to select just one part. Press Clear to start a new recording.

Step 11: Download your music as MP3 or WAV

Open the Download panel, choose MP3 or WAV, choose the bitrate or bit depth, sample rate and channels, choose the whole recording or the selected part, and set the options for normalising, letting the last notes ring out, removing silence at the start, and fading in and out. The panel shows the estimated file size. Press Download and the piano renders your performance with all your sound settings and saves the file to your device.

Online Piano Instrument Sounds: Complete Sound List

The IndiPiano Online Piano gives you a complete General MIDI style sound library of 127 real sampled instruments in 16 families. Each sound has its own number, so you can find it quickly in the list or step through them one by one.

Piano

• 001 Acoustic Grand Piano
• 002 Bright Acoustic Piano
• 003 Electric Grand Piano
• 004 Honky-tonk Piano
• 005 Electric Piano 1
• 006 Electric Piano 2
• 007 Harpsichord
• 008 Clavinet

Chromatic Percussion

• 009 Celesta
• 010 Glockenspiel
• 011 Music Box
• 012 Vibraphone
• 013 Marimba
• 014 Xylophone
• 015 Tubular Bells
• 016 Dulcimer

Organ

• 017 Drawbar Organ
• 018 Percussive Organ
• 019 Rock Organ
• 020 Church Organ
• 021 Reed Organ
• 022 Accordion
• 023 Harmonica
• 024 Tango Accordion

Guitar

• 025 Acoustic Guitar (Nylon)
• 026 Acoustic Guitar (Steel)
• 027 Electric Guitar (Jazz)
• 028 Electric Guitar (Clean)
• 029 Electric Guitar (Muted)
• 030 Overdriven Guitar
• 031 Distorted Guitar
• 032 Guitar Harmonics

Bass

• 033 Acoustic Bass
• 034 Electric Bass (Finger)
• 035 Electric Bass (Pick)
• 036 Fretless Bass
• 037 Slap Bass 1
• 038 Slap Bass 2
• 039 Synth Bass 1
• 040 Synth Bass 2

Strings

• 041 Violin
• 042 Viola
• 043 Cello
• 044 Contrabass
• 045 Tremolo Strings
• 046 Pizzicato Strings
• 047 Orchestral Harp
• 048 Timpani

Ensemble

• 049 String Ensemble 1
• 050 String Ensemble 2
• 051 Synth Strings 1
• 052 Synth Strings 2
• 053 Choir Aahs
• 054 Voice Oohs
• 055 Synth Choir
• 056 Orchestra Hit

Brass

• 057 Trumpet
• 058 Trombone
• 059 Tuba
• 060 Muted Trumpet
• 061 French Horn
• 062 Brass Section
• 063 Synth Brass 1
• 064 Synth Brass 2

Reed

• 065 Soprano Sax
• 066 Alto Sax
• 067 Tenor Sax
• 068 Baritone Sax
• 069 Oboe
• 070 English Horn
• 071 Bassoon
• 072 Clarinet

Pipe

• 073 Piccolo
• 074 Flute
• 075 Recorder
• 076 Pan Flute
• 077 Blown Bottle
• 078 Shakuhachi
• 079 Whistle
• 080 Ocarina

Synth Lead

• 081 Lead 1 (Square)
• 082 Lead 2 (Sawtooth)
• 083 Lead 3 (Calliope)
• 084 Lead 4 (Chiff)
• 085 Lead 5 (Charang)
• 086 Lead 6 (Voice)
• 087 Lead 7 (Fifths)

Synth Pad

• 088 Pad 1 (New Age)
• 089 Pad 2 (Warm)
• 090 Pad 3 (Polysynth)
• 091 Pad 4 (Choir)
• 092 Pad 5 (Bowed)
• 093 Pad 6 (Metallic)
• 094 Pad 7 (Halo)
• 095 Pad 8 (Sweep)

Synth Effects

• 096 FX 1 (Rain)
• 097 FX 2 (Soundtrack)
• 098 FX 3 (Crystal)
• 099 FX 4 (Atmosphere)
• 100 FX 5 (Brightness)
• 101 FX 6 (Goblins)
• 102 FX 7 (Echoes)
• 103 FX 8 (Sci-fi)

Ethnic and World Instruments

• 104 Sitar
• 105 Banjo
• 106 Shamisen
• 107 Koto
• 108 Kalimba
• 109 Bagpipe
• 110 Fiddle
• 111 Shanai (Shehnai)

Percussive

• 112 Tinkle Bell
• 113 Agogo
• 114 Steel Drums
• 115 Woodblock
• 116 Taiko Drum
• 117 Melodic Tom
• 118 Synth Drum
• 119 Reverse Cymbal

Sound Effects

• 120 Guitar Fret Noise
• 121 Breath Noise
• 122 Seashore
• 123 Bird Tweet
• 124 Telephone Ring
• 125 Helicopter
• 126 Applause
• 127 Gunshot

Understanding Online Piano and Music Terms

Virtual piano

A virtual piano is a piano keyboard on a screen that you play with a mouse, touch screen, computer keyboard or MIDI keyboard. The IndiPiano Online Piano plays real recorded instrument samples through your browser’s audio engine, so it sounds and responds like a digital piano without any installation.

Sound samples

A sample is a short recording of a real instrument playing one note. The online piano uses 37 samples for each instrument, one for every semitone from C2 to C5, so each note sounds close to the real instrument. Notes outside this range are created smoothly from the nearest recorded note. For instruments that can hold a note, such as organ, strings, choir, brass, woodwind and synth pads, the sample is looped so the note keeps sounding for as long as you hold the key.

General MIDI

General MIDI is a widely used standard list of instrument sounds, arranged in families of eight such as Piano, Organ, Guitar, Strings, Brass, Reed and Pipe. The online piano follows the General MIDI order and names, so musicians who know keyboards, music software and MIDI files will find the sounds familiar.

MIDI keyboard

A MIDI keyboard is a piano-style controller that sends note information, how hard each key is pressed and pedal movements to a computer or phone over USB or Bluetooth. The online piano connects to MIDI keyboards through the Web MIDI feature of your browser.

Velocity and touch velocity

Velocity means how hard or fast a key is pressed, which sets how loud and bright the note sounds. A MIDI keyboard sends velocity automatically. On a touch screen or mouse, Touch velocity uses where you press on the key: lower on the key plays louder, and higher plays softer. The Dynamics knob controls how much velocity changes the sound.

Sustain pedal

On a real piano, the sustain pedal lifts the dampers so notes keep ringing after you release the keys. In the online piano, the Sustain pedal button, the Space bar and the pedal of your MIDI keyboard all do this, and the Sustain knob sets how long notes take to fade after you let go.

Transpose and semitones

A semitone is the distance between two neighbouring keys, such as C to C♯. Transposing shifts every note up or down by a number of semitones, so you can play a song in an easy key, such as C major, and hear it in the key that suits a singer. The online piano transposes from −12 to +12 semitones.

Octave

An octave is the distance from one note to the next note with the same name, such as C4 to C5, and it covers 12 semitones. Notes are named with an octave number, so C4 is middle C. The keyboard octave control moves the computer keys up or down by one octave at a time.

Chord

A chord is three or more notes played together. The online piano recognises 20 chord types as you play, including major, minor, diminished, augmented, sus2, sus4, 5 (power chord), 6, m6, 7, maj7, m7, m7♭5, dim7, mMaj7, add9, m add9, 9, maj9 and m9, and shows slash chords such as C/E when the lowest note is not the root.

Grand staff

The grand staff is the two-line system used for piano music, with the treble clef for higher notes and the bass clef for lower notes. The Music sheet view writes every note you play on the grand staff in real time, with ledger lines, sharps and chords stacked together.

Reverb, echo and room size

Reverb is the natural reflection of sound in a room or hall, which makes music sound fuller and more spacious. Room size sets how long the reverb lasts. Echo is a clear repeat of the sound after a delay, with Echo time setting the gap and Repeats setting how many times it repeats.

Equaliser, warmth, width and compressor

Bass, Mid and Treble boost or cut the low, middle and high frequencies of the sound. Warmth adds gentle analogue-style saturation for a rich, vintage colour. Width makes the stereo image narrower or wider. The compressor evens out loud and soft notes for a more polished, studio sound.

MP3, WAV, bitrate, bit depth and sample rate

MP3 is a compressed audio format that makes small files that are easy to share, and its quality is set by the bitrate in kbps. WAV is an uncompressed format with full studio quality, and its quality is set by the bit depth (16-bit, 24-bit or 32-bit float). The sample rate, such as 44.1 kHz or 48 kHz, is how many times per second the sound is measured.

Normalise and fades

Normalising raises the level of the whole recording so its loudest point reaches a set level, here −1 dB, for a strong, even volume without distortion. A fade in makes the sound start gently from silence, and a fade out makes it end smoothly.

Key Features of the Online Piano

A huge library of real instrument sounds

Play 127 sampled instruments in 16 families, from grand piano, electric piano and harpsichord to organ, guitar, bass, violin, cello, choir, trumpet, saxophone, flute, synth leads and pads, sound effects and world instruments including sitar, shehnai, koto and kalimba. A searchable instrument list, sound numbers and previous and next buttons make it quick to explore every sound.

Optimised, lightweight samples that load fast

Every instrument uses 37 carefully prepared MP3 samples that keep a natural, detailed sound while staying light. Samples load in parallel from the middle of the keyboard outward, failed notes are retried automatically, backup servers are used if needed, and the last six instruments you used stay ready in memory so you can switch between them instantly. Only the instrument you choose is loaded, so the piano opens fast even on phones and slower connections.

Realistic playing response

Notes respond to velocity from your MIDI keyboard or touch position, brighten as you play harder, sustain naturally with the pedal, and loop for held instruments. Up to 60 notes can ring at once, so you can play full chords with the pedal down without notes cutting off.

Play your way: mouse, touch, computer keyboard or MIDI

Play with multi-touch on phones and tablets, glide across the keys, use 37 computer keys across three rows with octave shifting, or connect any USB or Bluetooth MIDI keyboard with velocity and sustain pedal support. Several MIDI devices can be connected and switched on or off, and new devices are detected automatically.

Piano particles visualizer

Glowing light bars rise from each key you press, in colours that follow the instrument family and the pitch of the note, with sparkles that grow with your playing strength. It turns every performance into a beautiful light show, ideal for videos, teaching and fun.

Live music sheet view

Switch to Music sheet to see every note written on a scrolling grand staff with treble and bass clefs, ledger lines, sharps and stacked chords, with the notes you are holding highlighted in colour. It is a great way to connect what you play with how it is written.

Note and chord display

The display above the keyboard shows the notes you are playing and names the chord in real time, with a level meter. When you change a setting, it briefly shows the new value, and when you are not playing it shows the volume, transpose, tempo and sustain status.

16 studio sound controls and 9 presets

Shape the sound with four groups of knobs: Notes (Speed, Transpose, Sustain, Dynamics), Space (Reverb, Room size, Echo, Echo time, Repeats), Tone (Bass, Mid, Treble, Warmth) and Master (Width, Compressor, Volume up to 200 percent). Or choose a preset: Natural, Concert hall, Bright studio, Warm vintage, Cathedral, Small room, Ambient echo, Lo-fi radio or Dry and close.

Recording with timeline editing

Record up to 10 minutes of playing, including instrument changes during the take, see every note on a timeline, play it back, move the playhead, select any part to play or export, and clear it to start again. Playback follows the Speed knob from 0.25× to 2×, so you can slow down or speed up your recording.

Professional MP3 and WAV export

Download your recording as MP3 at 96, 128, 160, 192, 256 or 320 kbps, or as WAV at 16-bit, 24-bit or 32-bit float, at 44.1 kHz, 48 kHz, 32 kHz or 22.05 kHz, in stereo or mono. Export the whole take or a selected part, normalise to −1 dB, let the last notes ring out, remove silence at the start, and add fades of up to 2 seconds in and 4 seconds out. Your audio is rendered with all your sound settings, and the file size is estimated before you download.

Built-in metronome and transpose

Practise in time with a metronome of 2 to 8 beats per bar at 30 to 260 BPM, with an accented first beat and a visual beat display, and transpose from −12 to +12 semitones.

Flexible keyboard sizes and labels

Choose 25, 37, 49 or 61 keys, show computer key letters, note names or no labels, and use the scroll strip to move along wider keyboards on small screens. A Play guide shows exactly which computer key plays which note.

Works in every browser and on every device

The piano runs online in Chrome, Edge, Safari, Firefox and Opera on Windows, macOS, Linux, Android, iPhone and iPad, adapts to every screen size, supports full screen, and needs no download, plug-in or account. Nothing is stored in your browser, so every visit starts fresh.

What You Can Do With the Online Piano

Learn and practise piano anywhere

Practise songs, scales and chords on any phone, tablet or computer when you do not have a piano nearby, using the note labels and the music sheet view to learn note names and reading.

Play songs with your computer keyboard

Use the three rows of computer keys to play melodies and simple chords, and use the Play guide to learn the key layout quickly.

Turn a MIDI keyboard into a full sound module

Connect a MIDI keyboard and play all the instrument sounds with velocity and sustain, without buying or installing any software.

Explore orchestral, band and world sounds

Play strings, brass, woodwinds, choir, guitars and basses to hear how a melody sounds on different instruments, or try sitar, shehnai, koto and kalimba for Indian and world music colours.

Compose and record ideas

Record a melody or chord progression, play it back, select the best part and download it as MP3 or WAV to keep, share or import into music software.

Create music for videos and social media

Use presets such as Concert hall, Ambient echo or Lo-fi radio, record a short piece, and export a polished audio file. The piano particles visualizer also looks great in screen recordings.

Teach music in class or online

Teachers can show notes, chords and the music sheet on a large screen, demonstrate different instrument sounds, and use the chord display to explain harmony.

Learn chords and harmony

Play any group of notes and see the chord name instantly, including slash chords, to learn chord shapes on the keyboard.

Accompany singing in any key

Use Transpose to move songs into a comfortable key for a singer, and play the accompaniment on piano, organ, strings or pads.

Practise in time

Turn on the built-in metronome to practise rhythm, and record your playing to check your timing on the timeline.

Tips for Playing the Online Piano

Use a MIDI keyboard for the best experience

A real keyboard with velocity gives the most natural feel. Choose 49 or 61 keys on screen so the visible keyboard matches your instrument.

Use wired headphones or speakers

Wired headphones and built-in speakers have the lowest delay. Bluetooth headphones can add a short delay between pressing a key and hearing the note.

Hold Space for the pedal

When playing with the computer keyboard, hold the Space bar like a sustain pedal to connect chords smoothly, and release it to clear the sound.

Try the presets first

Each preset is a ready-made sound character. Start with one, then fine-tune the knobs, and double-click any knob to reset it.

Turn sustain off for fast passages

For fast melodies or staccato playing, turn the Sustain pedal off or lower the Sustain knob so notes do not blur together.

Rotate your phone

On phones, landscape orientation gives wider keys and makes playing chords easier. Full screen mode gives even more room.

Use the music sheet to check your notes

Switch to Music sheet while practising to see whether you are playing the right notes, especially when learning to read music.

Select before you export

Drag on the timeline to select the best part of your take, choose Selected part in the Download panel, and turn on Remove silence at the start for a clean file.

Choose the right export format

Use MP3 at 192 kbps for sharing and messaging, 320 kbps for the best MP3 quality, and WAV at 24-bit and 48 kHz for video editing or music production.

Troubleshooting

The IndiPiano Online Piano 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 system is a little different, so if something does not work as expected, please check the points below.

The keys do not play while it says Loading

The piano waits until all notes of the instrument are loaded so that every key sounds correct. Wait for the progress ring to finish and the status to show Ready. On a slow connection this can take a few seconds.

It says Built-in sound or Ready with fewer than 37 notes

If some samples could not be downloaded, the piano fills the missing notes from the nearest recorded note. If no samples could be downloaded, it uses a built-in stand-in sound and shows Built-in sound. Check your internet connection and choose the instrument again, or reload the page.

There is no sound

Browsers only start audio after you interact with the page, so tap or click a key once. Check that the Volume knob is above zero, your device volume is up, and your phone is not on silent. On iPhone and iPad, switch the ring or silent switch to ring.

There is a delay between pressing a key and hearing the note

Use wired headphones or the device speaker instead of Bluetooth, close other apps and tabs that use audio, and restart the browser if the delay continues.

The computer keyboard does not play notes

Computer keys only play when the piano is visible on screen and you are not typing in a text box such as the instrument search or the tempo box. Click on an empty part of the piano and try again.

My MIDI keyboard is not detected

Web MIDI works in Chrome, Edge and Opera on computers and Android. Safari on iPhone, iPad and Mac does not support Web MIDI. Make sure the keyboard is plugged in and switched on, press the MIDI button, choose Allow, and press Refresh. If you blocked access earlier, allow MIDI devices for the site from the lock icon next to the address bar.

The download does not start or saves as WAV

MP3 export needs a small encoder that is loaded when you press Download. If it cannot load, the piano saves your recording as WAV instead and tells you. Keep the tab open while the file is rendering, and check your browser’s download settings if nothing appears.

The keyboard is too small on my phone

Choose 25 or 37 keys, rotate to landscape, use full screen, or use the scroll strip below the keys to move along a wider keyboard.

The animations feel slow

Collapse the visualizer, close other tabs, or use a more recent browser. If your device has reduced motion turned on, the sparkle effects are reduced automatically.

Frequently Asked Questions

Is the IndiPiano Online Piano free?

Yes. The online piano is completely free, with no download, no plug-in, no account and no limit on playing, recording or downloading.

How many instrument sounds does the online piano have?

It has 127 real sampled instruments in 16 General MIDI families, including pianos, organs, guitars, basses, strings, ensembles, brass, reeds, pipes, synth leads, synth pads, synth effects, world instruments, percussion and sound effects.

Can I play the online piano with my computer keyboard?

Yes. 37 computer keys across three rows play three octaves, the arrow keys move the octave, and the Space bar works as a sustain pedal. Open the Play guide to see the full key map.

Can I connect a MIDI keyboard?

Yes. Press the MIDI button and allow access. USB and Bluetooth MIDI keyboards are supported in Chrome, Edge and Opera, with note velocity and sustain pedal.

Can I record and download what I play?

Yes. Record up to 10 minutes, then download the whole take or a selected part as MP3 (96 to 320 kbps) or WAV (16-bit, 24-bit or 32-bit float), with your chosen sample rate, stereo or mono, normalising and fades.

Does the downloaded file include my sound settings?

Yes. The download is rendered with your instrument, reverb, echo, equaliser, warmth, width, compressor, volume and speed settings, so it sounds like what you heard.

What is the Music sheet view?

It is a live grand staff that writes every note you play in standard notation as you play, with treble and bass clefs, sharps, ledger lines and chords.

What is Piano particles?

It is a visualizer that shows coloured light bars and sparkles rising from each key you press, coloured by instrument family and pitch, for a beautiful view of your music.

Does the piano show chord names?

Yes. When you play two or more notes, the display names the chord, recognising 20 chord types and slash chords.

Does it work on mobile phones and tablets?

Yes. The piano works on Android phones, iPhones, iPads and tablets with multi-touch, and on laptops and desktop computers. Landscape mode and full screen give the most room.

Why does the piano load quickly?

Only the instrument you choose is downloaded, each instrument uses 37 optimised, lightweight samples, and the samples load in parallel. The last few instruments stay ready in memory, so switching back is instant.

Does the online piano save anything on my device?

No. Nothing is stored in your browser. Every page load starts fresh, and your recordings stay only in the page until you download them.