Vocal→Ambient Pad
Stretch a short vocal phrase into a smooth, evolving harmonic bed.
Free browser-based granular synth
Granular Synthesizer Online
Turn vocals, instruments, loops and field recordings into evolving pads, textures, glitches and soundscapes — directly in your browser.
Local audio processingNo plugin installBuilt-in demo sound
Granular Engine
Local browser processing
Ready
Built-in demo0:05
Grain Cloud
Current character
Dream
18 grains/sec
180 ms grains
Shape the grains
Start with a preset, then make it yours.
Advanced controls
Record the processed output to export it
Hear the transformation
Turn familiar audio into a different kind of instrument.
Granular synthesis does not need a perfect sample. A spoken word, one piano note, a drum loop or a phone recording can become useful sound-design material once it is divided into grains and recombined.
Piano→Dream Texture
Turn one piano note into a floating texture with movement and space.
Drum Loop→Glitch
Scatter transients into chopped fragments, repeats and unpredictable rhythms.
Field Recording→Drone
Freeze environmental sound into a dense, cinematic layer that can sustain.
Sound design, not presets only
What can you create with a granular synth?
Use the online granular synthesizer as a fast way to explore a source before opening a DAW, or as a standalone tool for generating new audio ideas.
Ambient Pads
Build long, evolving beds from tiny moments in a source recording.
Sound Textures
Create organic movement for music, film, games and experimental sound design.
Glitch
Break loops and transients into fragmented, rhythmic grain patterns.
Drones
Turn a brief sound into sustained tonal or noisy layers.
Soundscapes
Spread grains across pitch and stereo space for immersive atmospheres.
New Samples
Resample familiar audio into material that no longer feels like the original.
Granular synthesis explained
A sound becomes thousands of tiny moments.
A granular synthesizer takes a recording and divides it into short audio grains, often measured in milliseconds. Those grains can overlap, repeat, move through the source, change pitch, reverse and spread across the stereo field.
The result can stay recognizable or become an entirely new texture. GranularSynth exposes the controls that matter most without forcing you through a large modular synth interface.
Read the granular synthesis guide →01
Source audio
A vocal, instrument, loop or field recording enters the browser.
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02
Slice into grains
The engine captures tiny windows from the source audio.
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03
Scatter and overlap
Density, spray, pitch and stereo spread reshape how the grains behave.
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04
New sound
The grain cloud becomes a pad, texture, glitch, drone or new sample.
～～ GRANULAR CLOUD ～～
Core granular controls
Enough control to shape the sound. Not enough to get lost.
Start with a character preset, then adjust the six controls that have the biggest effect on the granular synthesis result.
Position
WhereChoose the point in the source audio where new grains are captured. Move slowly for scanning textures or hold one point for a frozen sound.
Grain Size
How longSet the duration of each audio grain. Tiny grains sound detailed and synthetic; longer grains preserve more source character.
Density
How manyControl how frequently grains are generated. Higher density blends fragments into a smoother granular cloud.
Spray
How randomScatter grain positions around the selected point. A little adds movement; a lot creates unpredictable textures.
Pitch
How highTranspose grains up or down without changing which part of the source is being explored.
Stereo Spread
How wideDistribute individual grains across the stereo field to move from a focused signal to a wide sound cloud.
Built for exploration
One granular instrument, many workflows.
Granular synthesis sits between sampling, synthesis and effects. That makes the same tool useful across music production and sound design rather than for one narrow genre.
Music Producers
Turn vocals, instruments and loops into new source material without leaving the browser.
Ambient Artists
Create sustained pads, frozen tones, shimmering clouds and slow-moving textures.
Beat Makers
Granulate drums and samples into chops, stutters, fills and rhythmic fragments.
Sound Designers
Explore cinematic layers, transitions, drones and abstract effects from everyday recordings.
Film & Game Audio
Transform field recordings into atmospheres and materials for scenes, environments and worlds.
Experimental Musicians
Use pitch, density, spray and reverse grains to discover sounds that are hard to design linearly.
Keep exploring granular sound.
Record a source in the sampler, learn how the underlying controls work, or compare plugin options when you want to move the workflow into a DAW.
Granular Sampler Online
Record or load a sample, granulate it and record the processed result.
Explore →Best Granular VST Plugins
Compare current granular instruments and effects by workflow and format.
Explore →Free Granular VST Plugins
Find free granular plugins with current version and compatibility caveats.
Explore →What Is Granular Synthesis?
Understand grains, size, density, position, spray and the main granular workflows.
Explore →Granular synth FAQ
Questions before you start granulating.
The online granular synthesizer is designed to be usable before you know the terminology. These answers cover the concepts that matter most.
What is a granular synthesizer?+
A granular synthesizer breaks audio into tiny fragments called grains and continuously rearranges, overlaps, pitches and scatters them to create new textures, pads, drones and rhythmic effects.
Is this granular synth free to use?+
Yes. The browser-based granular synthesizer is free to use and does not require a plugin download for the core sound-design workflow.
Does my audio get uploaded?+
No. The granular engine is designed to process your audio locally in the browser, so your source audio does not need to be uploaded to our server.
Can I record and download the granular sound?+
Yes. Start the granular synth, record the processed output in the browser, then download the recording. The available audio container depends on recording support in your browser.
What audio works well with granular synthesis?+
Vocals, piano notes, guitar, field recordings, percussion, drum loops and sustained instruments all work well. Short recordings can become long ambient pads, textures, glitches and drones.
What do grain size and density do?+
Grain size controls how long each audio fragment lasts. Density controls how frequently new grains are generated. Small grains with high density create smooth clouds, while lower density can sound more fragmented and rhythmic.
Can I use this instead of a granular VST?+
The online synth is useful for fast sound exploration and exporting ideas without installing a plugin. A granular VST is still useful when you need automation, MIDI and direct integration inside a DAW.
Make something unfamiliar
Turn one ordinary sound into somewhere new.
Load a vocal, instrument, loop or recording and start shaping grains directly in your browser.
Open the Granular Synth