Test, validate, and debug your regular expressions with real-time visual feedback. Identify matches instantly across multi-line test strings. Professional, secure, and 100% private.
🔍 Launch Regex Tester → ⚡ Real-time Highlighting • 🔒 100% Private • 🚀 Regex Flags SupportSee your matches come to life as you type. Our real-time engine highlights every successful match and capture group in your test data.
Your test strings and patterns stay on your machine. All processing happens locally in your browser, ensuring sensitive data remains private.
Easily toggle Global (g), Multiline (m), Case-insensitive (i), and more. Test exactly how your regex will behave in your target environment.
Handle complex logs or long documents. Our tester supports large, multi-line test strings with persistent highlighting for better debugging.
Input your regular expression into the pattern field. Choose your required flags (g, i, m).
Add the text you want to search through. Matches will appear instantly as you type.
Review the highlighted results and copy your final, verified regex string to your project.
Test complex patterns for emails, phone numbers, or passwords before implementing them in your frontend code.
Create patterns to extract specific errors or data points from server logs with instant visual confirmation.
Verify that your capture groups are correctly identifying segments for complex refactoring tasks in your IDE.
We respect your proprietary code. Our tester runs purely in your browser's RAM; no patterns or test strings are logged or saved to any server.
Flags are modifiers that change how the engine searches. For example, 'i' makes it case-insensitive, while 'g' finds all matches rather than stopping at the first.
Our tool uses the standard JavaScript (V8) Regex engine, making it perfect for web and Node.js development.
Yes! PixelOkay provides this and all other developer tools for free with no daily limits or registration required.