Skip to main content

Installer for Desktop version of Regex Hero

As Firefox just dropped support for Silverlight I really needed a solution for Regex Hero. So I created an installer for it. It's still Silverlight, but by using the installer you can install it directly to your computer and never need to open it in a browser.

If you visit and don't have a browser that supports Silverlight (IE is the only one left), then you'll see download links for 64-bit and 32-bit versions of the installer.

When you install it you'll see a link over on the right hand side that says "Activate Regex Hero". This process connects your desktop version of Regex Hero with your online account. So if you're a licensed user this is how you'll gain access to all of those licensed features.

Note: Currently there will be a security warning when you try to run either one of these installers. I'm in the process of obtaining a code signing certificate and will update them as soon as possible.

You may be wondering about the status of the HTML5 version of Regex Hero. My previous post more than a year ago was about my development of this version. I may still finish this at some point but I've been too busy lately to work on it. In any case, at least the installer allows a way to bypass all the browser issues.

Update (May 21, 2022):
This installable version is no longer available. But Regex Hero is available now in the Microsoft Store.


  1. Thank you for providing this desktop version! The site has been a lifesaver and now that I cannot utilize the site, I am glad you created the desktop version.

  2. Thanks for the desktop version.
    An HTML5 version would be nice, but why not a "simpler" migration from siverlight to UWP and then you can even put it in the Store?

  3. Web version is no longer working. Please if you can fix it. I think, this is the best regex viewer.

  4. Your contribute to the programming world is immense. Thank you for releasing such a wonderful product as a desktop version! Amazing!

  5. Thank you so much for your amazing work, this tool is a lifesaver (literally, I spend less of my life dealing with regular expressions and focusing on something else). Previously I had to use Javascript regex and then pray it worked for .NET. Best C# regex tool!!!!

  6. Thank you for creating and maintaining such an amazing tool. With recent security changes in my office, I was unable to add the Silverlight version to my desktop. This post for the Desktop Installation package was a lifesaver and it has allowed me to install to my desktop.

    However, the post says there's an "Activate Regex Hero" link that allows me to link my licensed login to the application. I don't see that on my install, mine looks exactly like the Silverlight browser instance. The installed shortcut seems like it simply launches a Silverlight version, outside of the browser. I have the Login link in the upper left corner (No Activate link) and when I click on it, it launches a separate browser with the web version for me to login to. This doesn't link my login to my desktop instance so I'm unable to Save anything; it just tells me that I need to login.

    Any suggestions on how to resolve this? Should it have installed something different on my machine?

    1. Had the same problem, here's what worked for me. Uninstall the desktop version if you currently have it installed. Log into your account in IE (, and click the ".NET Regex Tester" link in the header. This should open the web version with you logged in. You should see a "Install on your Desktop" link at the bottom of the options column at the right. Click that and install. The desktop version should now open with your account logged in.

  7. Entire site is down!! What's up???

  8. hi,
    sorry but at work i didnt have marketlplace windows open, do exists any .msi installer ?


Post a Comment

Popular posts from this blog

Regex Hero for Windows 10 is Underway

Awhile back I began working on an HTML5 / JavaScript version of Regex Hero . However, it was a huge undertaking essentially requiring a complete rewrite of the entire application. I have not had enough time to dedicate to this lately. So I've begun again, this time rewriting Regex Hero to work in WPF. It'll be usable in Windows 10 and downloadable from the Microsoft Store. This is a much easier task that also has the advantage of running the .NET regex library from the application itself. This will allow for the same speedy experience of testing your regular expressions and getting instant feedback that Regex Hero users have always enjoyed. I expect the first release to be ready in Q4 of 2019.

Optimizing Your Regular Expressions

Regular expressions will backtrack.  That's an unfortunate thing about them because backtracking can be slow.    And in certain (rare) cases the performance can become so awful that executing the regular expression against a relatively short string could take over a minute.  There's a good article about catastrophic backtracking over at . And today I created a video about all of this called  Regex Lesson 5: Optimization .  In the video I start with a very poorly written regular expression and make several improvements to it, using the benchmarking feature along the way.  By the end of the video I make the regular expression over 3 million times faster. In addition, today's update to Regex Hero provides a little message in the event that you encounter a regular expression that takes over 10 seconds to evaluate... And then last of all, I changed the benchmarking feature a bit.  In the past it would simply test your regular expression against