Online Regex Tester Free

Regex Tester

Test and validate regular expressions instantly! Perfect for developers who need to create, test, and debug regex patterns. Features real-time matching, syntax highlighting, and detailed explanations of regex components.

Features

• Real-time Testing: See matches instantly as you type
• Match Highlighting: Visual highlighting of matched text
• Global and Case-insensitive Flags: Test with different regex flags
• Common Patterns: Pre-built regex patterns for common use cases
• Match Groups: View captured groups and their values
• Pattern Explanation: Understand what your regex does

Common Regex Patterns

Email Validation

Pattern: ^[^\s@]+@[^\s@]+\.[^\s@]+$

Phone Numbers

Pattern: ^\+?[\d\s\-\(\)]+$

URLs

Pattern: https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)

IPv4 Address

Pattern: ^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$

Credit Card Numbers

Pattern: ^\d{4}[\s\-]?\d{4}[\s\-]?\d{4}[\s\-]?\d{4}$

Use Cases

• Form Validation: Validate user input in web forms
• Data Cleaning: Extract and clean data from text
• Log Parsing: Parse log files and extract information
• Text Processing: Find and replace text patterns
• API Development: Validate request parameters

Start testing your regular expressions today and master pattern matching for your development projects!