Try REBOL 3 2.100.82

Want to try out the REBOL programming language without downloading it? Installing REBOL is quick and easy due to its small size, but trying it here is even easier. Just type your REBOL expressions in the above form and press the Do button.

Please note that some functions will not work in this web environment, such as interactive programs. Most notably, the cross-platform graphics system is not accessible. You'll have to install REBOL/View to run GUI examples.

This is not a browser plug-in: your REBOL scripts run on our server. Limits apply; for example, you may receive an evaluation error message if processing takes too long, or a blank result if you're using too much memory or other resources.