Test and debug regex patterns online with real-time matching, capturing groups, and explanations.
Want to jump straight in? Use our free Regex Tester tool directly.
Navigate to the Regex Tester tool on UtilsNow. It provides a real-time testing environment.
Type or paste your regular expression pattern in the pattern input field at the top.
Choose regex flags like global (g), case-insensitive (i), multiline (m), or dotAll (s) as needed.
Paste or type the text you want to test against in the test string area. Matches are highlighted in real time.
View all matches, capturing groups, and their positions. The tool shows exactly what each group captures.
Use our free Regex Tester tool — no signup, no uploads, works directly in your browser.
Open Regex TesterThe tool uses JavaScript regex syntax, which is compatible with most programming languages including Python, Java, and PHP for common patterns.
Yes, the tool displays all capturing groups with their indices and captured values for each match.
Yes, the tool provides a breakdown of what each part of your regex pattern does, making it easier to understand and debug.