Regex Tester
Test and debug regular expressions
Match patterns against text and see results in real-time
Language:
Regex Tester
Test Results
Enter text to test against...
Tips
- • Use ^ for start of string and $ for end of string
- • Use . to match any character and * for zero or more
- • Use \d for digits, \w for word characters, \s for whitespace
- • Use parentheses () to create capture groups
This tool helps you test and debug regular expressions. Enter a regex pattern and test string to see matches, groups, and positions in real-time.
Did You Know?
Regular expressions were first developed in the 1950s by mathematician Stephen Cole Kleene as a notation for describing regular languages.
The term 'regex' is a portmanteau of 'regular' and 'expression', commonly used in programming and text processing.
Regex patterns are used in search engines, text editors, programming languages, and data validation to match and manipulate text patterns.
These facts help provide context and educational value about the tool's purpose and history.