Online Keyboard Synth is a free keyboard synthesizer that runs right in your browser — open the page and start playing instantly, with no downloads and no sign-up.
Key Features
- Multiple ways to play — computer keyboard, mouse or touchscreen, plus support for external MIDI controllers
- Waveforms and presets — choose a waveform and sound preset, then shape your own tone
- Built-in effects — reverb and delay for a wider, richer sound
- Octaves and chords — switch octaves to widen your range and play chords
- Built-in recorder — capture whatever you play
- Works everywhere — desktop, tablet and mobile, so you can play anytime, anywhere
- Runs locally — completely free, ad-free, no account needed
Ideal for
- Beginners trying keys before buying an instrument
- Music teachers needing a quick demo or scale demonstration
- Anyone who wants to play a few notes in a spare moment
