Regex Tools
Free online regex tools to test, generate, and validate regular expression patterns.
What are Regex Tools?
Regex Tools is a collection of utilities for working with regular expressions. Regular expressions are powerful patterns for matching, searching, and manipulating text.
Our tools include a real-time regex tester with match highlighting, a pattern generator with common templates, and a syntax validator.
Frequently Asked Questions
What is a regular expression?
A regular expression (regex) is a pattern that describes a set of strings. Regex is used for searching, matching, and manipulating text.
What regex flavor does this use?
These tools use JavaScript regex syntax, which is supported in all modern browsers and similar to other flavors.
What are regex flags?
Flags modify matching: g (global), i (case-insensitive), m (multiline), s (dotall), u (unicode).