5 free regular expression tools

Problem

Why doesn't my regular expression work?

Solution

Regular expressions are hard to write, hard to read, and hard to maintain. Plus, they are often wrong, matching unexpected text and missing valid text. The problem stems from the power and expressiveness of regular expressions. Each metacharacter packs power and nuance, making code impossible to decipher without resorting to mental gymnastics.

There are 5 free tools that can be used to test regular expressions for validity and accuracy before using it.

The Regex Coach

The Regex Coach is powerful graphical application for Windows which can be used to experiment with (Perl-compatible) regular expressions interactively.

Expresso

Features:
- Build complex regular expressions by selecting components from a palette;
- Test expressions against real or sample input data
- Display all matches in a tree structure, showing captured groups
and other.

Regular Expression Designer

Rad Software Regular Expression Designer is a free download that helps programmers learn, develop and test Regular Expressions. It is an interactive Windows application that is designed to be simple and easy to use.

Regulator

The Regulator is an advanced, free regular expressions testing and learning tool written by Roy Osherove. It allows you to build and verify a regular expression against any text input, file or web, and displays matching, splitting or replacement results within an easy to understand, hierarchical tree.

Regular Expression Workbench

Create, test, and study regular expressions with this workbench. With the "Examine-o-matic" feature, hover over the regex to decode what it means.

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