Test, highlight, and debug your Regular Expressions instantly in your browser.
| Match # | Full Match | Capture Groups | Index |
|---|---|---|---|
| Waiting for valid regex and test string... | |||
What we do
Watch your matches light up instantly as you type. Our real-time engine applies accurate highlighting to your test text without requiring you to click a submit button.
Working with complex data extraction? Our intelligent breakdown table beautifully maps numbered and Named Capture Groups directly to their extracted values.
Format text instantly. Use `$1`, `$2`, or `$
Easily experiment with regex behavior by toggling Global (g), Case-Insensitive (i), Multiline (m), and Dotall (s) flags using our intuitive quick-toggle buttons.
Our intelligent background Web Worker architecture prevents infinite loops. If a complex regex triggers Catastrophic Backtracking, the engine safely intercepts it without freezing your browser.
Testing regex against proprietary database dumps or sensitive user data? Your text never leaves your computer. Everything is executed locally in your browser.