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Visual Regex Builder & Online Pattern Tester

Professional regex builder tool with visual interface. Create, test and validate regular expressions online with real-time pattern matching and code generation.

Regex Tools & Utilities:
Component count: 0

Flags

Visual Regex Pattern Builder

Start with simple patterns and gradually make them more complex

Select a regex component from the dropdown above to start building your pattern.

💡 Regex Builder Tip:

📱 Mobile: Tap to expand regex components

🖱️ Desktop: Drag to reorder pattern elements

Generated Pattern:

Your generated regex pattern will appear here for testing and validation...

Regex Syntax Quick Reference

.Any character - regex wildcard pattern
\dDigit pattern (0-9) - numeric character class
\wWord character pattern (a-z, A-Z, 0-9, _) - alphanumeric class
\sWhitespace character pattern - space, tab, newline
*Zero or more quantifier - regex repetition pattern
+One or more quantifier - mandatory repetition
?Zero or one quantifier - optional pattern matching
^Line start anchor - regex boundary
$Line end anchor - regex boundary
[]Character class - custom character set
()Capturing group - regex grouping pattern
|Alternation (OR) - regex choice pattern
Regex Flags & Modifiers:
g Global flag - match all occurrences
i Case insensitive flag - ignore letter case
m Multiline flag - multiline pattern matching
s Dot-all flag - dot matches newlines

Tips

Start with simple patterns and gradually make them more complex

Use the test area to try your regex with real data

You can use preset patterns from the common patterns section

Master Regex with Professional Learning Tips

Learning regular expressions takes time and practice. Use our regex builder to accelerate your pattern matching skills.

🎯 Start with Simple Patterns
Master basic character classes and quantifiers before advancing to complex lookahead patterns
🧪 Test Regex Patterns Regularly
Validate your regular expressions with diverse test data after each pattern modification
📚 Practice Real-World Regex
Gain expertise by implementing regex patterns in real projects and data validation scenarios