Free online synth with oscillators, LFOs, filters, effects, noises, instruments and more.
This is a powerful online synthesizer. More than a simple synth, it lets you easily create your own synths with any number of intermediate audio processing modules. Create and customize any number of oscillators, LFOs, filters, effects, envelopes, noises, instruments, keyboards, gains, panners, meters, recorders and more. You can also record what you play and download the audio as a WAV file.
Instead of using a fixed synth with a fixed signal path, you can build your own instrument by creating audio nodes (oscillators, LFOs, synths, noises, filters, effects, envelopes, gains, panners, meters, scales) and wiring them together freely.
This tool is free, with no download required, no signup required and works directly in the browser. It was created using Tone.js library.
Features
Unlimited audio nodes
Create any number of oscillators, LFOs, synths, noises, filters, effects, envelopes and more. Connect the processing modules freely to create any type of sound or instrument.
Customizable envelopes
Customize attack, decay, sustain and release. Choose between diferent types of curves: linear, exponential, bounce, cosine, sine, ripple and step.
Multiple types of filters
Many types of filters available: lowpass, highpass, bandpass, lowshelf, highshelf, notch, allpass and peaking.
Multiple types of effects
Many types of effects available: feedback delay, tremolo, distortion, ping-pong delay, reverb and more.
Multiple types of instruments
Many types of instruments available: basic synth, AM synth, FM synth, Mono synth, Duo synth, Membrane synth, Metal synth, Noise synth and Pluck synth.
Different types of modulation
Frequency Modulation (FM), Amplitude Modulation (AM).
Recording and export
Record what you play and download the audio as a WAV file. Record the master output or only the modules connected to the recorder.
Sequences
Play the keyboards programmatically: add a sequence of notes with start time, duration and velocity, then render it and download the audio as a WAV file.
Changelog
2026-09-30
Added sequences: play notes on the keyboards at programmed times, and download the rendered audio as a WAV file.
2026-09-03
Added recorders: record the audio and download it as a WAV file.
2025-12-14
Initial version, with oscillators, LFOs, instruments, noises, filters, effects, envelopes, connections, keyboards, meters, scales, gains and panners.
