Terms and Conditions

The rules of the road for using this free browser synthesizer — short, because there's no catch.

Last verified: 2026-09-04

The service

Online Keyboard Synth provides a free online synthesizer that runs in your web browser, including the playable keyboard, sound presets, MIDI input, and the recorder, plus the guides and reference text on the site. The service is provided free of charge, without registration.

Your recordings and music

Anything you play, record, and download with the tool is yours. You may use your recordings for any purpose, personal or commercial, without crediting this site. We claim no rights over your performances.

Acceptable use

Use the site as a normal visitor: play it, learn from it, record with it. Don't attempt to disrupt the service, scrape it at abusive volume, or misrepresent it as your own product.

No warranty

The site is provided "as is" and "as available." We work to keep the instrument accurate and available — the synth core is unit-tested and compatibility notes are checked against public data — but we make no warranty that the service will be uninterrupted, error-free, or suitable for any particular purpose. Browser support for features like Web MIDI depends on the browser vendors and can change.

Limitation of liability

To the maximum extent permitted by law, Online Keyboard Synth and its maintainer are not liable for any indirect, incidental, or consequential damages arising from the use of the site — including lost recordings. Download takes you care about promptly.

External links

The site links to external references such as caniuse.com. We are not responsible for the content or policies of third-party sites.

Changes and contact

These terms may be updated as the site evolves; the "Last verified" date above always reflects the current version. Questions:hello@onlinekeyboardsynth.com.