Regex Tester
Test and debug regular expressions
Formula Used
Runs your regular expression against the test string using the JavaScript RegExp engine and lists all matches.
Step-by-Step Explanation
- 1Enter your regular expression pattern and flags (e.g. g, i).
- 2Enter the text to test against — matches highlight instantly.
Worked Examples
Example 1
Match email addresses
Pattern: [a-z]+@[a-z]+\.[a-z]+
Finds hello@calcproo.com in the text