Regex Tester
Test regular expressions with live matching and highlighted results. Supports common flags to help debug and validate patterns. Fully processed in your browser.
Runs in your browser
Real-time
Pattern
Presets
Test text
Matches
| # | Range | Match | Groups |
|---|
Each match will be listed here
Replace
About this tool
Test regular expressions with live matching and highlighted results. Supports common flags to help debug and validate patterns. Fully processed in your browser.
How to use
- Fill in the input box above, or click "Fill sample" to try it instantly
- Adjust the options as needed — results update as you type
- Click "Run" to get the result, then copy or export it in one click
Tips
- Runs entirely in your browser — your data never leaves the device
- Completely free, no registration, no usage limits
- Most tools compute in real time as you type