Regex Tester
Test regular expressions against strings.
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Features
Live Matching
See regex matches highlighted in your test string as you type.
Flag Support
Toggle common regex flags like global (g), case-insensitive (i), and multiline (m).
Error Reporting
Get instant feedback if your regular expression is invalid.
About Regex Tester
A live regular expression tester that lets you build and debug regex patterns. Instantly see how your pattern matches against a test string, with support for common flags. It's an indispensable tool for any developer working with text processing or validation.
How to Use Regex Tester
- Enter Regex Pattern: Type your regular expression in the main input field without slashes.
- Select Flags: Toggle the 'g' (global), 'i' (case-insensitive), or 'm' (multiline) flags as needed.
- Provide Test String: Paste or type the text you want to test your regex against.
- View Matches: All matching parts of the test string will be highlighted in real-time.