Developer tool
Regex Tester
Test a regular expression against sample text and inspect matching results in your browser.
Result
Your result will appear here.
Privacy note: most tools process input locally in your browser.
About the Regex Tester
Run a JavaScript regular expression against sample text and list matches or errors.
How to use this tool
Enter a pattern without slash delimiters, add valid flags such as g or i, paste sample text, and click Test expression.
Example
Pattern \d+ matches sequences of digits.
Tips for better results
Regular expressions can be complex; avoid untrusted patterns on huge text. This tool uses JavaScript regex syntax.
Frequently asked questions
What syntax does it use?
JavaScript regular expressions.
Why is my pattern invalid?
Check escaping, brackets and flags.