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Learn, Create, Understand, Test, Convert, Use, And Save Regular Expressions with RegexBuddy

Learn Regex Syntax Today

Learn all there is to know about regular expressions today with RegexBuddy's detailed, step by step regular expression tutorial. When you buy RegexBuddy, you get the tutorial both as a help file that you can read on your computer, and as a PDF file that you can print.

You will learn each of the different elements that compose a regular expression, step by step in logical order. If you already have some experience with regular expressions, this logical separation enables you to brush up your knowledge on specific areas. When trying to understand a regex, you only need to click the Explain Token button, and RegexBuddy will present you the appropriate topic in the tutorial.

Read more about RegexBuddy's detailed regex tutorial

      
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Regex Tree and Regex Building Blocks

RegexBuddy's regex building blocks make it much easier to define regular expressions. Instead of typing in regex tokens directly, just pick what you want from a descriptive menu. Use RegexBuddy's neatly organized tree of regex tokens to keep track of the pattern you have built so far.

When you need to edit a regular expression written by somebody else, or if you are just curious to understand or study a regex you encountered, copy and paste it into RegexBuddy. RegexBuddy's regex tree will give you a clear analysis of the regular expression. Click on the regular expression, or on the regex tree, to highlight corresponding parts. Collapse part of the tree to get a good overview of complex regular expressions.

Quickly and easily create and edit regular expressions. Mix manipulating RegexBuddy's building blocks and directly editing the regex pattern to suit your own skill and style. Rely on RegexBuddy as you rely on a buddy or coach to assist you.

Find out how RegexBuddy makes it easy to create or write regexes
Learn how RegexBuddy enables you to quickly understand other people's regexes
Watch a video showing how to build regular expressions with RegexBuddy

RegexBuddy’s plain English regex tree makes it easy to understand exactly what a regular expression does in your application
RegexBuddy’s plain English regex tree makes it easy to understand exactly what a regular expression does in your application

Regex Tester and Debugger

Don't risk actual data with untested regexes. Copy and paste sample data into RegexBuddy, or open test files. Step through the search matches in the sample data, and get a detailed report about each match. Or highlight all matches to debug the regex in real time as you edit it.

If a regex doesn't do what you want, debug it by looking at the complete matching process, eliminating all guesswork.

Learn how you can avoid risk by testing and debugging regexes
Watch a video showing how to test and debug regular expressions

RegexBuddy shows you exactly how a regular expression finds its match, and why it works the way you want or doesn’t

Compare and Convert Regular Expressions Between Flavors

Compare your regular expressions between any number of all the regular expression flavors that RegexBuddy supports. Make sure your regex works with all the versions of the application you're targeting. Easily learn the differences between your usual regex flavor and a new flavor that you need to use next.

Convert a regular expression created for one application to any other application. RegexBuddy automatically substitutes equivalent syntax and warns you about any subtle differences in behavior between the two applications.

Never again wonder why a regex that works correctly with one application doesn't work in exactly the same way with another application.

Find out how to compare regexes between applications
Learn how to convert regexes between applications

Converting a regex from C# to Delphi

Develop Efficient Software Quickly with Instant Code Snippets

Save time and code efficiently by using regular expressions when developing applications and scripts. With the proper regex, you can often do in a single line of code, or a few lines of code, what would otherwise require dozens or hundreds.

Rely on RegexBuddy to handle the details, such as which classes and function calls to use, and how to escape special characters. Just select the language you are working with, and the action you want to perform. Test whether a string matches a regex, extract matches from a string, search and replace, split a string, etc. RegexBuddy knows all the common regex actions and how to perform them with a variety of programming languages: C#, VB.NET, VB 6, Delphi, Java, Perl, PHP, JavaScript, VBScript, Python, Ruby and C/C++.

Read more about RegexBuddy's support for various programming languages
Watch a video showing how to develop software with regular expressions

Using regular expressions with the JavaScript RegExp Object

Your Own RegexBuddy Library

Build your own collection of handy regex patterns, and use them whenever you want to. You can easily browse through and instantly search through the regexes you collected. When you found the regex you want, click the Use button.

For common tasks, use one of the many regular expressions you can find in RegexBuddy's library of pre-created regular expressions. You will find readily useful regexes for a wide variety of tasks. For many tasks, there will be several choices of regex patterns, with the differences clearly described.

Find out more about RegexBuddy's regex libraries

RegexBuddy’s vast regular expression library

Search and Replace through Files and Folders

Quickly search through files and folders with RegexBuddy's built-in GREP tool. Edit many files at once by searching and replacing with regular expressions. RegexBuddy offers all the functionality you'd expect from a basic GREP tool. Built on the same GREP technology as PowerGREP, RegexBuddy outclasses many stand-alone GREP tools.

Search (and replace) through files and folders with RegexBuddy’s built-in GREP tool

Integration with Your Favorite Software

RegexBuddy is designed to be used as a companion to whatever software you use regular expressions with. Such applications include search tools, text editing and processing tools, programming and development tools, etc. Whenever you need to write or edit a regular expression while working with those applications, RegexBuddy pops up to provide assistance, and disappears when you finish editing the regex.

Integrating RegexBuddy with the software makes your workflow much smoother. RegexBuddy integrates with many popular applications for working with regular expressions. If your software does not integrate with RegexBuddy, urge its developers to implement this. Any programmer can easily integrate RegexBuddy with his or her software.

Watch a video showing RegexBuddy and PowerGREP in action

"RegexBuddy is exactly the extra tool I needed. It takes away my uncertainty as a regex (PowerGREP) user.

"Regexes are extremely powerful, but RegexBuddy shows quite well that their complexity can be tamed without degrading their performance!"

— Vincent Vercauteren
  5 May 2004, Belgium

Let RegexBuddy Make Regex Easy for You