I use regular expressions in .NET a lot, and I would like to have a tool that makes it easier to build long and complicated regular expressions. I'm using Windows 7 Professional 64-bit.
What tool do you recommend for this purpose?
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I recommend Expresso. It is a free tool, but you need to register you after a trial period. Registering it is also free.
Here is a screenshot (click for larger image):
I am using Rad Regex Designer. I was fascinated about it a few years ago as I started learning the regular expressions concept. It has:
Here is a screenshot of the application:
I love RegexBuddy. This is not a free product ($40USD), but its capabilities make it a bargain. I have been using it for years.
This is a Windows-only product that can handle many different regex flavors. It has a real-time evaluator which shows you the results of your regex as you type it, a debugger which helps find errors, and an editor that works about how you'd expect it to.
It has a tool to export the regex you just built in a form that can be used directly in many programming languages.
It's backed up by a great website that includes help for the program, and regular expressions in general.