Regex Tester
Test regex patterns
Regular expressions are powerful but notoriously tricky to debug. Our interactive tester shows real-time match highlighting, capture groups, and detailed error explanations. Test against multiple input strings simultaneously and export your validated patterns for JavaScript, Python, PHP, and Java.
How to Use
Enter Input
Enter your input in the input area above.
Configure Options
Configure any options if available.
Process
Click the convert/process button.
Get Result
View the result in the output area.
Usage Examples
Email Validation
Test the pattern /^[\w.-]+@[\w.-]+\.\w{2,}$/ against common email formats. See real-time match highlighting for valid and invalid addresses.
Phone Number Extraction
Use /\b\d{3}[-.]?\d{3}[-.]?\d{4}\b/ to extract all US phone numbers from a block of text. Supports formats like 555-123-4567 and 555.123.4567.
URL Parsing
Decompose URLs with /^(https?):\/\/([^\/:]+)(?::(\d+))?(\/.*)?$/ to capture protocol, domain, port, and path separately for web scraping and analytics.