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Regex Tester

Test, extract, replace, and explain regular expressions.

//
Test String
Matches

No matches found

Common Patterns

Quick Reference

\d - Digit
\w - Word character
\s - Whitespace
. - Any character
* - 0 or more
+ - 1 or more
? - 0 or 1
^ - Start of string
$ - End of string

About Regex Tester & Debugger Online

Free online regular expression tester. Test regex patterns against strings in real-time, see highlighted matches, and explore common regex patterns.

How to use Regex Tester

  1. 1Enter your regex pattern (without surrounding slashes) in the Pattern field.
  2. 2Set flags: g (global), i (case-insensitive), m (multiline) as needed.
  3. 3Paste your test string in the input area.
  4. 4All matches are highlighted and listed in the results panel.

Frequently Asked Questions

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