# Regular Expression (Regex) Tester & Explainer

> Test JavaScript Regular Expressions against test strings with instant match highlighting.

- **Category / Silo**: developer
- **Free Access**: Yes (No credit card required)

## Tool Description
Test JavaScript Regular Expressions against test strings with instant match highlighting.

## Key Steps & Implementation
1. **Enter Regex Pattern**: Input regex string (e.g., ^[a-z0-9]+$).
2. **Paste Test String**: Insert text to test against pattern.
3. **Review Matches**: Inspect captured groups and highlighted matches.

## Key Benefits
- Live Match Highlighting
- Capture Group Breakdowns
- Flags Selector
- Free Usage

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URL: https://cacto.cc/tools/developer/regex-tester