Regex Pattern Generator
Generate and test regular expressions instantly with our powerful regex pattern generator. Perfect for validating emails, phone numbers, passwords, URLs, and custom text patterns. Features live testing, common pattern templates, and detailed explanations for developers and analysts.
What is a Regular Expression (Regex)?
A regular expression is a sequence of characters that defines a search pattern. It's used for string matching, validation, and text processing. Examples:
- Email pattern:
^[^\s@]+@[^\s@]+\.[^\s@]+$ - Phone number:
^\(\d3\) \d3-\d4$ - Strong password:
^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$
Common Use Cases for Regex Patterns
- ✅ Form validation (email, phone, credit card)
- ✅ Data extraction from text files
- ✅ Password strength validation
- ✅ URL and domain validation
- ✅ Log file parsing and analysis
- ✅ Text processing and replacement
Why Our Regex Generator is Better?
Pre-built Templates
- Ready-to-use patterns for common validations
- Email, phone, password, URL, and date patterns
Live Testing & Validation
- Test your regex against sample text instantly
- Highlight matches and capture groups
- Real-time pattern explanation
Related Tools
Enhance your workflow with these complementary tools:
Text Case Converter
Convert text cases before applying regex patterns
Password Generator
Generate passwords that match your regex validation
Hash Generator
Generate hashes for validated data
Base64 Converter
Encode/decode data after regex processing
How to Use the Regex Generator
- Choose a template or write your custom regex pattern
- Enter test text to validate against your pattern
- See live matches and explanations instantly
- Copy the working regex for use in your code
Frequently Asked Questions
How do I validate email addresses with regex?
Use this pattern for basic email validation:
^[^s@]+@[^s@]+.[^s@]+$
What's the regex for strong password validation?
This pattern requires uppercase, lowercase, number, and special character:
^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$How do I test regex patterns before using them?
Use our live testing feature above! Enter your pattern and test text to see matches instantly. You can also use our text diff checkerto compare before/after regex replacements.
Are the regex patterns cross-language compatible?
Most patterns work across JavaScript, Python, PHP, Java, and C#. Some advanced features may vary between languages. Always test in your target environment.