Regex Collection
Search, test and copy 100+ common regular expression patterns
When to Use Regex Collection
Form Validation
Validate user input in web forms including email addresses, phone numbers, postal codes, and credit card numbers for instant feedback
Data Extraction
Extract specific patterns from large text files or documents, such as URLs, email addresses, or dates for data processing and analysis
Data Cleaning
Clean and standardize data by finding and replacing text patterns, removing invalid entries, or formatting inconsistent data
Security Filtering
Detect and filter malicious input patterns, SQL injection attempts, XSS attacks, or other security threats in user-submitted content
API Development
Implement input validation in REST APIs and microservices to ensure data integrity and proper request parameter formatting
Log Analysis
Parse and analyze log files by extracting IP addresses, timestamps, error codes, and other patterns for monitoring and debugging
Frequently Asked Questions
What is a regex collection?
A regex collection is a library of commonly used regular expression patterns that solve frequent validation and text matching problems. Our collection includes tested regex patterns for email validation, phone numbers, URLs, dates, credit cards, postal codes, and many other common use cases. Each pattern is ready to use and comes with examples.
How do I use this regex collection tool?
Using our regex collection is simple: 1) Browse or search for the pattern you need using keywords like 'email' or 'phone', 2) Filter by category to narrow down results, 3) Click on any pattern to view details and examples, 4) Test the regex with your own text in the built-in tester, 5) Copy the pattern to use in your code. All patterns are ready to use in JavaScript, Python, PHP, and other languages that support regex.
Is this regex collection free to use?
Yes, our regex collection is completely free to use with no registration required. You can search, test, and copy unlimited regex patterns without any cost. There are no hidden fees, premium features, or usage limits. All patterns are open source and can be used in personal and commercial projects.
Can I test regex patterns before using them?
Absolutely! Our tool includes a built-in regex tester. Click on any pattern to expand its details, then enter your test text to see real-time matching results. The tester shows all matches and helps verify the pattern works for your specific use case before implementing it in your code.
What programming languages are these regex patterns compatible with?
Most regex patterns in our collection use standard regex syntax compatible with JavaScript, Python, PHP, Java, Ruby, Go, and other programming languages. Some patterns may use JavaScript-specific features (noted in descriptions). When copying a pattern, you may need to adjust delimiters or flags based on your language (e.g., Python uses raw strings r'pattern', JavaScript uses /pattern/flags).
How accurate are these regex patterns?
Our regex patterns are carefully curated and tested against common use cases. Each pattern includes examples of valid inputs it should match. However, remember that perfect validation often requires more than just regex - for critical validations like email or credit cards, consider using specialized libraries or additional server-side checks alongside regex.
Can I suggest new regex patterns or improvements?
While we maintain a comprehensive collection of common regex patterns, we're always looking to improve. If you have suggestions for new patterns or improvements to existing ones, please contact us through our feedback channels. We regularly update the collection based on user needs and emerging validation requirements.
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