Regular Expression Tester

What is Regular Expression Tester?

The Regular Expression Tester helps you build, test, and debug regex patterns. It provides real-time matching, capture group analysis, pattern highlighting, and explanations of regex components. Perfect for developers working with text processing and validation.

How to use Regex Tester?

Enter your regex pattern, select appropriate flags, add test text, then click "Test Regex". The tool will show all matches, capture groups, and highlight matches in your text. Use quick patterns for common regex needs like emails, URLs, and phone numbers.

What are regex flags?

g (global): Find all matches, not just the first
i (ignore case): Case-insensitive matching
m (multiline): ^ and $ match line breaks
s (dot all): . matches newline characters

Regular Expression Tester: Frequently asked questions

Here are some commonly asked questions about regular expression tester tool:

What is the best feature of Regular Expression Tester?

The best feature of this tool is the real-time highlighting of matches in the test string, along with detailed capture group information.

Is regular expression tester free to use?

Yes, the Regular Expression Tester is completely free to use and accessible from any device with a web browser.