RegExr is a HTML/JS based tool for creating, testing, and learning about Regular Expressions. (by gskinner)

RegExr Alternatives

Similar projects and alternatives to RegExr

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a better RegExr alternative or higher similarity.

RegExr reviews and mentions

Posts with mentions or reviews of RegExr. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-10-10.
  • Hot Springs
    1 project | | 3 Jan 2024
    When thinking about how I might compare an arrangement to the contiguous group of damaged springs, I used to experiment with very specific regexs that used the numbers.
  • Demystifying Regular Expressions (Regex): A Chat Sheet Guide
    1 project | | 27 Dec 2023
    There are plenty of online regex tools to test and experiment with regex patterns. Some popular ones include RegExr, RegEx101, and RegexPlanet.
  • Camel Cards
    1 project | | 16 Dec 2023
    Using it at least appears to work as expected.
  • [2023 Day 2] [Python] Stuck on the first task
    1 project | /r/adventofcode | 9 Dec 2023
    If you are going to use RE's, use something like to double check that they're doing what you want. I was suspicious of your 'cols = re.findall(r'\d+ .....', i)' line, and indeed it does miss some columns. You should rethink your column detection, and either not use REs or learn how to use capture groups and \w. There would then be no reason to use yet another RE in your column iterator to extract the numbers which you've already detected.
  • 2023 Day 2 Part A [Java] regex pattern not matching
    1 project | /r/adventofcode | 4 Dec 2023
    First time posting here, let me know if I need to edit post to conform to any rules. My issue is that I'm trying to match regex pattern to separate out the number of cubes drawn and its color but my Matcher object seems to not be returning any matches so it's throwing a no match found exception when I try to call I have tested my regex pattern on sites like regexr and it seems to pass there but it's not working for some reason here. I use the same type of regex on day one and it work there so I'm not sure where my regex pattern is failing here. I'm talking about specifically in my isGameValid() method where I create a matcher base on a pattern I made above. Through debugging I know that I separated the string color pairing correctly and that my Matcher object has the correct regex pattern, it's just not matching for some reason. Any help would be appreciated. Code below:
  • Trebuchet?!
    1 project | | 1 Dec 2023
    Regexr has been an invaluable tool as a beginner.
  • 10 Lesser-Known Tools and Websites to Spice Up Your Developer Toolbox
    8 projects | | 10 Oct 2023
    RegExr simplifies working with regular expressions. This online tool provides a visual interface for building and testing regex patterns in real-time, making regex less intimidating.
  • What regex flavour does vscode use in language-configuration.json
    1 project | /r/vscode | 10 Jul 2023
  • Regex not working
    2 projects | /r/vba | 10 Jul 2023
    Ho did you arrive at the regex? I usually use a website to , such as,, in combination of each other, as some explain better than the other.
  • Capture the first instance, but don't stop?
    1 project | /r/regex | 8 Jul 2023
    I pulled this into and it yielded the same results except it removed :41:
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    With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js. Learn more →


Basic RegExr repo stats
27 days ago

gskinner/regexr is an open source project licensed under GNU General Public License v3.0 only which is an OSI approved license.

RegExr is marked as "self-hosted". This means that it can be used as a standalone application on its own.

The primary programming language of RegExr is JavaScript.

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