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Comprehensive regex reference guide with syntax patterns, character classes, quantifiers, anchors, groups, and flags. Includes interactive examples, common patterns (email, phone, URL), and quick lookup for regex syntax elements.
Generate and test regex patterns for validating phone numbers. Supports international formats, country-specific patterns, optional formatting (spaces, dashes, parentheses), and provides ready-to-use regex patterns for common phone number formats.
Generate and test regex patterns for validating IPv4 and IPv6 addresses. Provides accurate regex patterns that match valid IP addresses, supports CIDR notation, and includes validation examples for network programming and security applications.
Validate URLs using regex patterns. Test URLs against standard regex patterns, check for valid protocols (http, https, ftp), domain formats, paths, query parameters, and fragments. Includes common URL regex patterns ready for use.
Validate email addresses using regex patterns. Test emails against RFC 5322 compliant patterns, check for valid local and domain parts, and get ready-to-use regex patterns for email validation in your applications.
Visualize regex patterns as interactive flowcharts and syntax trees. See how regex patterns are structured, understand pattern matching flow, and learn regex syntax through visual representation of character classes, quantifiers, groups, and alternations.
Find and replace text using regex patterns. Match complex patterns and replace them with new text, use capture groups in replacements, preview changes before applying, and perform batch replacements on multiple strings or files.
Test and match regex patterns against text in real-time. See all matches highlighted, extract capture groups, test multiple patterns, and get detailed match information including position, length, and matched groups for regex debugging and validation.
Debug and optimize regex patterns step-by-step. See how the regex engine processes your pattern, identify performance issues, find backtracking problems, and get suggestions for optimizing complex regex patterns.