The Best Free Online Synthesizers

The Best Free Online Synthesizers The Best Free Online Synthesizers

Whether you're a seasoned music producer or an enthusiastic noobie, there's a world of free online synthesizers out there that offer a playground of endless sonic possibilities. Not only do you not need a DAW to use them, but they won't cost you a cent!

From classic analog-inspired synths to futuristic soundscape software, every free online synthesizer on this list can provide a fun and unique way to whip up mesmerizing tunes without breaking the bank.

So, grab your headphones, fire up your browser, and come with us as we explore the finest free virtual synths available!

Step into , where simplicity meets power in perfect harmony! This awesome free online synthesizer boasts a sleek interface and comes jam-packed with over 120 quirky musical instruments — think guitars, pianos, organs, and percussion.

The possibilities are as vast as the cosmos. Plus, beyond using your trusty keyboard, you can even jam out with a connected MIDI controller.

But wait, there's more! isn't just about instruments. No, it's about full-fledged creativity using a symphony of effects and parameter options. Unleash your musical wizardry by tweaking synths and drum patterns to suit your vibe.

Need a jumping-off point? Dive into the many sound effects presets, or better yet, craft your very own custom configuration. truly sets the stage with this synth.

Viktor NV-1 Synthesizer

Viktor NV-1 Synthesizer is a sonic wonderland packed into your browser with over 60 mind-blowing presets. You'll find an explosion of sounds and instruments that work in all genres, each of which can be mangled, manipulated, and mastered using your trusty MIDI keyboard.

With the sci-fi-style Viktor NV-1, you're the captain of your sound voyage. Take charge of every parameter, from modulation to oscillation to noise to envelopes, just as you would on a hardware synthesizer. They leave you with the ultimate playground of creative options, though you're free to create unique configurations all your own.

And once you've unleashed your musical genius, you can save and share it with the world! Export your creations as a JSON file, and voila - they're ready to take flight. Plus, you can always return to your saved libraries and import them back into Viktor NV-1 for more musical escapades.


Webx0x is an electrifyingly awesome free online synthesizer that puts the power in your hands. With a plethora of controls and handy functions, it's surprisingly versatile for its minimalistic look.

Speaking of versatility, Webx0x brings you not one, not two, but four fantastic slots, each brimming with options for tempo, noise, tone, mix, sequencer, and MIDI manipulation. You can create totally unique configurations in each slot, then switch between them with seamless mixing and transitions.

The beauty of Web0x is that you don't even need an external MIDI keyboard, as it delivers a quality sequencer for the ultimate hands-free music-making journey. I'm not a keyboard wizard in the slightest, so very glad they integrated this feature. It's a truly trusty sidekick.

Once you're happy with your masterpiece, you save it to your Webx0x account and let the world revel in your brilliance.

WebSynths Microtonal

If you're into crisp, clean plugin interfaces and you love messing around with synthesizers, you gotta check out WebSynths Microtonal . It's got pretty much everything you need to create some killer tunes.

The synth comes loaded with options and resources to give you total control over your sound. You can adjust and tweak to your heart's content until you get that perfect vibe you're looking for.

They've got over 130 different synth sound presets to choose from, as well as a list of parameters to tweak in the different sections, including EQ, BPM, filters, oscillators, and more. You get all sorts of pro settings to play with.

The best part about this synth, however, is that it's super user-friendly. Just tap on the active mode, and the synth puts you in business, allowing you to cycle through the modes and arrange 'em in any order you like for a seamless transition between sounds.

Whether you're a seasoned pro or just starting out, WebSynths Microtonal is a wonderful little free synth for letting those creative juices flow! It's also worth noting that WebSynths has other instrument options on the website, so whether you need a digital synthesizer, guitar pedals, or a drum kit groovebox, you'll be able to find what you're looking for.


Meet the MZ-101 - a monophonic synthesizer that delivers the classic vibes of popular analog synths from the 70s and 80s, such as the legendary Roland SH-101.

While the Roland SH-101 may not be the most complex synth out there, here's a fun fact — plenty of smash hit records were created using this synth, including those from Madonna and Portishead. Sometimes, simplicity can be the winning ticket!

One cool thing about the MZ-101 is that you can load and save presets. And if you come up with some killer sounds that others just must hear, you can even share them on Twitter to show off your musical prowess.

The synthesizer can be played using your computer keyboard or just by clicking on the on-screen keys with your mouse. The features are easy to use, and there are plenty of good sounds to mess with.

Here's a heads-up, though. As with many browser-based synths, the MZ-101 synthesizer relies on the Web Audio API, so make sure your browser is API supported if you want to join in on the fun!


Alright, 80's kids, this one is for you.

If you're ready to take a nostalgia trip on your desktop, make sure to check out WebSID ! It's a virtual time machine of an online synthesizer that transports users back to those iconic Commodore 64 sounds from the good ol' days.

Best of all, using it is a piece of cake! Unlike some of the online synths on this list, the interface is super straightforward, so you'll be jamming in no time. Just fire it up on your browser of choice, whether Google Chrome or Safari and play it using your computer keyboard or any number of MIDI controllers.

Even if you're on a smartphone or tablet, no worries, as it's one of the few online synths where the on-screen keyboard responds to touch too!

If that wasn't enough, WebSID comes with a sweet built-in delay effect that opens up a whole world of sound design possibilities. So, let the memories flow and create some groovy tracks with this rad digital recreation.

Sympathetic Synthesizer System

Now, let's hop in real quick and talk about one of the sleepers on this online synths list — the Sympathetic Synthesizer System Mk 1 . This unique synthesizer is a super easy-to-use desktop instrument that's all about those nostalgic 80s and early 90s videogame vibes.

Now, unlike the WebSID, this synthesizer doesn't try to mimic any particular synth or chip. Even so, the developers got that videogame nostalgia locked in its sound. Whether you need an 8-bit-style synth bass, a digital-sounding xylophone, or a quirky flute, you'll no doubt find the perfect patch for your needs.

You can play this gem of a synthesizer using your trusty computer keyboard or simply tap away on the on-screen keys using your mouse. At this time, this web synthesizer does not support MIDI controllers.

However, it's also worth noting that the desktop Sympathetic Synthesizer System Mk 1 was built using the Web Audio API, so keep in mind it'll only work in browsers that support the API.

Unleash Your Creativity With These Online Synths

Alright, guys, there you have it! These online synths are excellent for anyone who wants to have all the right musical instruments at their fingertips. No more worrying about not having the sounds or presets you need without spending a boatload — these developers got you covered!

Best of all, there's no risk in trying them all, so get out there and start making some noise!

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