Free Online Synthesizers (Part 2)

Today we have part two of the free online synthesizers post series. There are a couple awesome drum machines and vintage-esque synths that I recently discovered, and they all produce thick, rich sounds. If you’ve got a few hours to kill between classes, or you want to get as little as possible done at work, check out the following synths.


This little creation is basically just a four voice synthesizer. There are four oscillators, four noise generators that you can use to color your sound, and a sequencer for each voice. Each section has its own tweakable settings, so it’s worth at least fifteen minutes of your time. Some of the parameters you can adjust:

  • Pitch Decay
  • Cutoff Frequency
  • Color (for the noise generators)
  • 16-step sequencer

If you’re new to synthesizers and sound design, this can be a fun starting point.




The WebModular synth is a simple little experiment created using HTML5 and Javascript. It provides six different patches from which you can manipulate and edit. There’s also a sequencer, but it’s unlike any I’ve ever seen before. You type in the notes in a text box and it plays those notes. There are two each of VCOs, VCFs, VCAs, and envelopes. If you’re new to modular synthesis, this synth makes for an easy introduction.




This free online synthesizer is, like many others, purely an experiment with coding and programming. I had trouble getting the thing to make any sounds, but on the web page it specifically says you probably need the latest version of Google Chrome. That aside, it looks rather intriguing. With all the classic features like an LFO, modulation envelope, an amplitude envelope, and filter, it appears to be a well-rounded monophonic synth. Check the screenshot below.




AudioTool isn’t really a free online synthesizer, but rather a full production suite. I believe there’s a paid version as well, but the free version has more than enough to keep you occupied for weeks. The best part is it features a drag-and-drop interface so you can just plop down new instruments or effects and connect them how you want.

The names of some of the synths are awkward (Pulverisateur and Machiniste?), but you’re provided with a decent selection. From their own take on the classic 808, 909, and 303 sounds to more modern synth noises in their Heisenberg synth, you’re sure to find something of interest.



And that concludes part 2 of this series. Check out part three here, or go back to part one!


Making EDM


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