Try It Online

Try It Online, or TIO, is a family of online interpreters maintained by Stack Exchange code golfer Dennis, which can be used to run and share code in many programming languages online. It supports the array languages Dyalog APL (as well as Extended Dyalog APL), dzaima/APL, ngn/apl, and J, and the K derivatives ngn/k, Kona, and OK. This allows these languages to be used from any web browser, even on devices that don't have the language installed or aren't supported by the language. The code itself is executed on a server.

Dyalog Ltd. is a sponsor of TIO and promotes it as a way to easily try out APL, along with its own TryAPL website.