RegexDesigner.NET is a powerful visual tool for helping you construct and test .NET Regular Expressions. When you are happy with your regular expression, RegexDesigner.NET lets you integrate it into your application through native C# or VB.NET code generation and compiled assemblies (usable from any .NET language).


  • Full source
  • Interactive matching of .NET regular expressions.
  • Syntax highlighted match results, including zero-length matches and hidden characters.
  • Tooltips to display matched groups.
  • Regular expression matching, replacing and splitting.
  • Regular expression projects to save expressions, text to match and all regex options.
  • Full code generation for C# and VB.NET for all regex operations.
  • Compiled assembly generation.
  • Full online help.

Comment Feed 6 comments on this post

Anthony Bova:

Thank you for this program. I had some nasty text files to parse and this cut through it like a hot knife through butter!

Tuesday, Jun 11, 2002, 12:00 AM


I still use this one everyday - Is this out on codeplex anywhere?

Wednesday, Jul 21, 2010, 2:20 PM

Chris Sells:

Not on any SCCS site, but full source is available at the link provided. Enjoy!

Wednesday, Jul 21, 2010, 5:15 PM


Thank you sir,

Sorry to be a pain - perhaps I'm not looking in the right place after installing it?

The .zip from the "Full Source" link ( has an installer; when I run him I see the binary at %ProgramFiles%\Sells Brothers RegexDesigner.NET & some .rep example files.


Tuesday, Jul 27, 2010, 7:13 AM

Chris Sells:

Full source is at I'll update the post with the correct links ASAP.

Tuesday, Jul 27, 2010, 10:43 AM


Amazing tool, it's what I've been looking for~

Monday, Oct 11, 2010, 11:50 PM

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