AI-Powered Holi: How Technology is Transforming the Festival of Colors
AI-Powered Holi: How Technology is Transforming the Festival of Colors
March 01, 2026
🔍 Regex Generator & Tester
Build, test, and validate regular expressions instantly with our free online regex tool. Perfect for developers, data analysts, and anyone working with pattern matching.
✅ Real-time Testing | 🎯 Common Patterns | 📊 Match Analysis | 🚀 Syntax Highlighting
📝 Regular Expression
🧪 Test String
📚 Common Regex Patterns
📧 Email Address
[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}
Matches standard email addresses with subdomains and TLDs
📞 US Phone Number
\b\d{3}-?\d{3}-?\d{4}\b
Matches US phone numbers with or without dashes
🌐 URL
https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&\/\\/=]*)
Matches HTTP/HTTPS URLs with parameters
🔐 Strong Password
^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$
Minimum 8 chars with uppercase, lowercase, number, and special char
📅 Date (YYYY-MM-DD)
^\d{4}-\d{2}-\d{2}$
Matches dates in ISO format (YYYY-MM-DD)
🎨 Hex Color
^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$
Matches hex color codes (#FFF or #FFFFFF)
❓ Frequently Asked Questions
🎯 What is a regular expression?
A regular expression (regex) is a sequence of characters that specifies a search pattern. It's commonly used for string matching, validation, and text processing in programming languages and text editors.
🚀 How do I test a regex pattern?
Enter your regex pattern in the pattern field, add test text in the test string area, select appropriate flags (g, i, m, s), and click "Test Regex Pattern". The results will show all matches with highlighting.
📊 What do the regex flags mean?
g (Global): Find all matches, not just the first one.
i (Ignore Case): Match without case sensitivity.
m (Multiline): ^ and $ match start/end of each line.
s (Dot All): . matches newline characters.
🔧 What are common regex use cases?
Regex is used for email validation, phone number formatting, URL parsing, password strength checking, data extraction, log file analysis, text replacement, and form validation in web applications.
💡 How can I improve my regex skills?
Practice with real-world examples, understand character classes, quantifiers, and anchors. Start with simple patterns and gradually build complexity. Use our common patterns library as a starting point.