Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.

The phrase regular expressions, or regexes, is often used to mean the specific, standard textual syntax for representing patterns for matching text, as distinct from the mathematical notation …

Menu RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp). Supports JavaScript & PHP/PCRE RegEx. Results update in real-time as you type. Roll over a …

Jul 8, 2025 · This page provides an overall cheat sheet of all the capabilities of RegExp syntax by aggregating the content of the articles in the RegExp guide. If you need more information on a …

Apr 12, 2024 · A regular expression (regex) is a sequence of characters that define a search pattern. Here's how to write regular expressions: Start by understanding the special characters …

Learn Regular Expressions with simple, interactive exercises. Regular expressions are extremely useful in extracting information from text such as code, log files, spreadsheets, or even …

Regular expressions or commonly called as Regex or Regexp is technically a string (a combination of alphabets, numbers and special characters) of text which helps in extracting …

Mar 1, 2025 · If you’ve ever needed to find specific text in a large document, validate user input, or extract key information from messy data, you’ve probably encountered regular expressions …

Oct 29, 2025 · This quick reference is a summary of all the regex syntax that is listed in the full reference tables, without any explanation. You can use this table if you’ve seen some syntax …

Regex is short for Regular Expression. It helps to match, find or manage text. Start by typing OK in the Regex field to proceed to the first step and access the more detailed description.. …