Regex Tester
Free online regex tester. Test regular expressions with real-time matching, replacement, and code generation.
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Frequently Asked Questions
What is a regular expression?
A regular expression (regex) is a pattern used to match character combinations in strings. It's powerful for search, validation, and text processing.
How do I test a regex pattern?
Enter your pattern between the / delimiters, select flags (like g for global), and enter test text. The tool will highlight all matches in real time.
What regex flavors are supported?
We support JavaScript, PCRE2, Python, Go, Java, .NET, PHP, Ruby, Rust, and POSIX flavors.