Free Regex Tester & Matcher Online
Test, build, and debug regular expressions (Regex) instantly against live text. Perfect for developers.
Regular Expression
Test String
Match Results
5 MatchesHow to Use
Type your regular expression pattern in the top input box (without the enclosing slashes).
Toggle the regex flags (g for Global, i for Case Insensitive, m for Multiline).
Type or paste the text you want to test against in the Test String area.
Matches will be instantly highlighted in blue within the text.
View the exact matches and capture groups below the text box.
Features
FAQ
Are you struggling to write the perfect regular expression for form validation, text parsing, or data scraping? Our free online Regex Tester is the ultimate tool for JavaScript and backend developers in 2026. Build, test, and debug your regex patterns in real-time. Instantly see which parts of your test string match your pattern with clear visual highlighting. Toggle flags like global (g) and case-insensitive (i) with a single click to see how they affect your capture groups. Because the matching engine runs entirely client-side, you can safely test regex patterns against sensitive PII data or secure logs without worrying about server-side tracking or data breaches.
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