RegExr: Learn, Build, & Test RegEx
RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
regex101: build, test, and debug regex
Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.
RegExr is a HTML/JS based tool for creating, testing, and learning ...
RegExr.com is an online tool to learn, build, and test Regular Expressions. It was created by Grant Skinner and the nice people at gskinner.com.
Regular expression - Wikipedia
A regular expression (shortened as regex or regexp), [1] sometimes referred to as a rational expression, [2][3] is a sequence of characters that specifies a match pattern in text. Usually such patterns are …
RegExr : Create & Test Regular Expressions - gskinner
RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
Regex Tutorial - How to write Regular Expressions
Dec 22, 2025 · A regular expression (regex) is a sequence of characters that defines a search pattern. It is mainly used for pattern matching in strings, such as finding, replacing, or validating text. Regex is …
Regex - IT Tools
RegExr was created by gskinner.com. Edit the Expression & Text to see matches. Roll over matches or the expression for details. PCRE & JavaScript flavors of RegEx are supported. Validate your …
Regexr - Learn, Build, & Test Regular Expressions | Developer Updates
Regexr is a powerful online tool designed to help users learn, build, and test Regular Expressions (regex). It provides an interactive environment where you can write and test regex patterns against …
Regexr Overview, Examples, Pros and Cons in 2025
RegExr is an online tool for learning, building, and testing Regular Expressions (regex). It provides a clean interface with real-time results, syntax highlighting, and a comprehensive reference guide.
Mastering Regexr: Building and Testing Regular Expressions
Learn how to use Regexr to build, test, and master Regular Expressions. This guide covers everything from basics to advanced tips for efficient Regex use.