Online Keyboard Synth

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