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

By putting ^ at the beginning of your regex and $ at the end, you ensure that no other characters are allowed before or after your regex. For example, the regex [0-9] matches the strings "9" as well as …

Description The /[^0-9]/ expression matches any character that is NOT a digit between 0 and 9.

Dec 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 …

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 match or …

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 in somebody …

If you want to learn Regex for Numbers and any Number Range with logic and Simple & Practical Examples, I will suggest you to see this simple and to the point Regex Course with step by step …

This cheatsheet provides a comprehensive and practical reference for regular expressions. It covers character classes, anchors, quantifiers, groups, common patterns, command combos, and more. …

Learn how to understand and use the regular expression ^-? [0-9]+$ to match integer numbers. This guide breaks down the syntax, characters, character classes, quantifiers, anchors, and more.

This free regular expression tester lets you test your regular expressions against any entry of your choice and clearly highlights all matches. It is JavaScript based and uses XRegExp library for …