RegExr 0.3.1 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This Mac application was originally developed by MacTechnologies Consulting.
The following versions: 1.3 and 0.3 are the most frequently downloaded ones by the program users. The program lies within Developer Tools, more precisely Help. The unique ID for this app's bundle is RegExr.8CE3EE8FC37F7781C562DFF80977CFBA322DD1EF.1. We recommend checking the downloaded files with any free antivirus. RegExRX_132_intel.zip is the default file name to indicate the RegExr installer.
From the developer:
A complete regular expression development tool meant for novices and professionals alike, this editor has many features designed to help in the development and storage of regular expressions. Based on the PCRE library, RegExRX will allow a user to craft patterns that are compatible with most regular expression flavors and will let them easily copy those patterns to other languages like Perl, Ruby, PHP and REALbasic.
You may want to check out more Mac applications, such as State Diagram Editor Free Edition, Fiddler or Kivy, which might be related to RegExr.
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