RegExr: A website for interactive regex prototyping with syntax highlighting
Nice work :) Looks like this tool puts the emphasis on the pedagogical aspect.<p>For development, the most fantastic tool that I know of in this space is debuggex. Here is an example with roman numbers:<p><a href="https://www.debuggex.com/r/Xqlv3QcAuw_EgPSM" rel="nofollow">https://www.debuggex.com/r/Xqlv3QcAuw_EgPSM</a>