For those who can't RegEx their way out of a wet paper bag..

[Jackolantern]

...like myself (I swear, I am going to sit down and really learn Regular Expressions 100% one day instead of just finding them on Stack Overflow, I promise!), I found a really neat project for a number of different languages (including most of the ones people use here) that lets you assemble RegEx expressions with plain-English method calls. I highly suggest to check out!

VerbalExpressions for node (includes links to other language and platform ports). Scroll down to "Testing if we have a valid URL" to see how its usage looks.

[Lord Rahl]

To test regular expression I tend to use a tool such as RegExr.

[hallsofvallhalla]

I couldn't regex my way out of an open bag that I was already dumped out of.

Good links. I will need them.

[MikuzA]

hah, VerbalExpressions looks awesome, like the way they built it, then, maybe, then, anythingbut
But sorry to say, I'm stuck with google on RegEx, It's not needed that often anyways in my work.

Tools are always good to test it thou, Security is important!

[Jackolantern]

I hear you Google has worked for me for some time now, but sometimes I need a really complex one that just isn't going to be on Stack Overflow or elsewhere. Like you said, not everyday, but it still looks like a great tool.