Run RXBuild in your browser
Github project page


The goal is to provide a useful, crossplatform, light and free toolset for working with regular expressions. RXBuild is a bunch of javascripts and an html main page gluing them together.


Run RXBuild

Simply open this link in your favorite browser (or Firefox). If you have a local copy of RXBuild, just open regex.html.

The page is divided in four parts:

Source Code

The project’s source is hosted at

To do

The list of features that I intend to implement is in the github wiki todo page


The code is tested only with Opera 9.6. Support for Firefox, Safari and IE7+ seems ok though.


Should be independent at runtime, however, to build, you need at least JS/CC. The Makefile uses JSDoc to build the documentation and YUI Compressor to reduce the sources size

Compile Instructions

There is no need to compile, unless you are editing the parser’s grammar (src/regex_parser.par).

See the MakeFile. Update the paths in Makefile.user before hoping for anything.


Licence and Copyright

'twas written by Eric Doughty-Papassideris

In short (and non legally binding): LGPL. Share or sell, just keep the notice below.

Copyright © 2009 by Eric Doughty-Papassideris

Licences is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

Licences is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU General Public License along with Licences. If not, see


You're getting this for free, and it comes with no garantees whatsoever. It comes as-is. I don't want to know about what happened (or not) because of this code. You are getting it "as-is", and it "is not my problem".