Free Online Regex Checker
Instantly check if your regex is valid and understand its components.
About
This tool helps you verify if your regular expressions are valid and provides a detailed breakdown of their components. To use it, simply enter your regex pattern in the text area and click "Check". You'll receive instant feedback on its validity and suggestions for corrections if needed.
Practical Examples:
- Check if a pattern can successfully match an email format.
- Verify regex patterns used in form validations.
- Understand complex regex components with a detailed breakdown.
Quick Reference
| Simple email validation | ^[\w.%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,}$ |
| Basic URL check | ^(https?|ftp)://[^\s/$.?#].[^\s]*$ |
| Match digits only | ^\d+$ |