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Regex Tester
Test JavaScript regular expressions against sample text and inspect matches.
Regex Matches
1. "[email protected]" at index 8 2. "[email protected]" at index 28
How to use Regex Tester
Step 1
Enter a JavaScript regex pattern without surrounding slashes.
Step 2
Add flags like g, i, or m when needed.
Step 3
Review all matches and their positions.
Example
Sample input
- Regex pattern
- \b[\w.%+-]+@[\w.-]+\.[A-Za-z]{2,}\b
- Flags
- gi
- Test text
- Contact [email protected] or [email protected].
Result preview
1. "[email protected]" at index 8 2. "[email protected]" at index 28
FAQ
Is the regex tester free to use?
Yes. This developer calculator is free and runs as an educational planning tool.
Is this financial advice?
No. Results are estimates for calculation and education only, not financial, tax, legal, or investment advice.