Test and debug your regular expressions in real-time.
Type your Regular Expression pattern into the top field. For example: `\d{3}` to match three digits.
Paste or type the text you want to test your RegEx against into the 'Test String' area.
The matches and any captured groups will instantly appear in the 'Matches' section. Syntax errors will be shown below.
A Regular Expression, often shortened to RegEx or Regex, is a sequence of characters that defines a search pattern. They are commonly used for 'find and replace' operations, validating input, and extracting substrings from text, especially in programming and text processing.
Absolutely. This RegEx Tester operates entirely client-side, meaning all your patterns and test strings are processed directly within your web browser using JavaScript. Nothing is ever sent to our servers, ensuring your data remains completely private and secure.