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Regex Tester

Real-time regular expression validation with syntax highlighting, match analysis, and common templates to help developers quickly debug regex patterns

Online Regular Expression Tester

Professional regex testing platform designed for developers, data analysts, and technical professionals. Supporting JavaScript, Python, Java, and other programming language regex syntax with real-time pattern validation, intelligent syntax hints, comprehensive analysis reports, and extensive template library. Whether you're a regex beginner or seasoned developer, quickly validate, debug, and optimize your regular expression patterns to significantly boost development efficiency and code quality.

Lightning-fast validation
Smart syntax hints
50+ useful templates
High-performance engine

Why Choose Our Regex Tester?

Lightning Speed

Built on optimized JavaScript engine, providing millisecond-level real-time matching feedback for a smoother debugging experience.

Professional Accuracy

Fully compatible with standard regex syntax, supporting all mainstream programming language regex features to ensure accurate test results.

Learning Friendly

Detailed match analysis, capture group explanations, and rich template library help you quickly master regex essentials.

Pattern ConfigurationStep 1

Email Address
Apply
Match standard email address format
^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\....
Phone Number
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Match international phone numbers
^\+?[1-9]\d{1,14}$
URL
Apply
Match HTTP/HTTPS URLs
^https?:\/\/(www\.)?[-a-zA-Z0-9@:%....
IP Address
Apply
Match IPv4 addresses
^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-...
Credit Card
Apply
Match major credit card numbers
^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][...
Hex Color
Apply
Match hexadecimal color codes
^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$
Numbers Only
Apply
Match digits only
^\d+$
Date Format
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Match YYYY-MM-DD date format
^\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]...
Password Strong
Apply
Match strong passwords (8+ chars, upper, lower, digit, special)
^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=....

Test ContentStep 2

Text processing tools:

Match AnalysisStep 3

0
Total Matches
✓
Pattern Status
Syntax valid

Start Testing Regex

Please enter regex pattern and test text to start validation

💡 Tip: Select common patterns from the left template library
🚀 Supports real-time matching and detailed analysis

User Guide

Quick Start

  • Enter your regex pattern in the left panel
  • Input test text content in the middle panel
  • View real-time match results and analysis on the right
  • Select appropriate match options and flags as needed

Core Features

  • Real-time syntax validation with instant error detection
  • Match result highlighting for visual pattern identification
  • Detailed capture group analysis and explanation
  • Comprehensive library of common regex patterns

Use Cases

  • Data validation: Verify email, phone number formats
  • Text processing: Extract specific pattern content
  • Code debugging: Test and optimize regex performance
  • Learning practice: Master regex syntax and techniques

💡 Pro Tips

Performance optimization: Avoid overly complex regex patterns. Use quantifiers and boundary matchers wisely to significantly improve matching efficiency.
Debugging techniques: Use capture groups to understand your regex matching logic, making it easier to debug and optimize your patterns.