🎯 Recommended Samples
Balanced sample collections from various categories for you to explore
Common Regex Patterns
Commonly used regular expression patterns for validation and matching
📝 ISO Date Format (YYYY-MM-DD)
🟢 simple
Validate ISO 8601 date format
🏷️ regex, regular-expression, pattern, validation, date, iso, format, basic
^\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])$📝 24-Hour Time Format
🟢 simple
Validate time in HH:MM format
🏷️ regex, regular-expression, pattern, validation, time, 24h, format, basic
^([01]\d|2[0-3]):[0-5]\d$📝 Username
🟢 simple
Validate username (alphanumeric, underscore, hyphen)
🏷️ regex, regular-expression, pattern, validation, username, user, account, basic
^[a-zA-Z0-9_-]{3,16}$📝 US Postal Code (ZIP)
🟢 simple
Validate US ZIP code format
🏷️ regex, regular-expression, pattern, validation, postal, zip, us, basic
^\d{5}(-\d{4})?$📝 Hexadecimal Color Code
🟢 simple
Match hex color codes (#RGB or #RRGGBB)
🏷️ regex, regular-expression, pattern, validation, color, hex, css, basic
^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$📝 Integer Number
🟢 simple
Match positive/negative integers
🏷️ regex, regular-expression, pattern, validation, number, integer, basic
^-?\d+$📝 Decimal Number
🟢 simple
Match decimal numbers with optional sign
🏷️ regex, regular-expression, pattern, validation, number, decimal, basic
^-?\d+(?:\.\d+)?$📝 Email Address
🟡 intermediate
Validate email addresses format
🏷️ regex, regular-expression, pattern, validation, email, contact
^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$📝 URL / Web Address
🟡 intermediate
Match HTTP/HTTPS URLs
🏷️ regex, regular-expression, pattern, validation, url, web, http, https
^https?:\/\/(?:www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b(?:[-a-zA-Z0-9()@:%_\+.~#?&\/=]*)$📝 IPv4 Address
🟡 intermediate
Validate IPv4 addresses
🏷️ regex, regular-expression, pattern, validation, ip, ipv4, network
^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$📝 US Phone Number
🟡 intermediate
Match US phone number formats
🏷️ regex, regular-expression, pattern, validation, phone, us, contact
^(\+?1[-.\s]?)?\(?[0-9]{3}\)?[-.\s]?[0-9]{3}[-.\s]?[0-9]{4}$📝 Strong Password
🟡 intermediate
Validate strong password (min 8 chars, uppercase, lowercase, number, special)
🏷️ regex, regular-expression, pattern, validation, password, security
^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$📝 US Social Security Number
🟡 intermediate
Validate SSN format
🏷️ regex, regular-expression, pattern, validation, ssn, us, identification
^(?!000|666)[0-8]\d{2}-(?!00)\d{2}-(?!0000)\d{4}$📝 HTML Tag
🟡 intermediate
Match HTML tags
🏷️ regex, regular-expression, pattern, validation, html, tag, web
^<([a-z]+)([^<]+)*(?:>(.*)<\/\1>|\s+\/>)$📝 UUID / GUID
🟡 intermediate
Validate UUID format
🏷️ regex, regular-expression, pattern, validation, uuid, guid, identifier
^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$📝 MAC Address
🟡 intermediate
Validate MAC address format
🏷️ regex, regular-expression, pattern, validation, mac, network, hardware
^([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})$📝 IPv6 Address
🔴 complex
Validate IPv6 addresses
🏷️ regex, regular-expression, pattern, validation, ip, ipv6, network, advanced
^(([0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]+|::(ffff(:0{1,4})?:)?((25[0-5]|(2[0-4]|1?[0-9])?[0-9])\.){3}(25[0-5]|(2[0-4]|1?[0-9])?[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1?[0-9])?[0-9])\.){3}(25[0-5]|(2[0-4]|1?[0-9])?[0-9]))$📝 Credit Card Number
🔴 complex
Match major credit card numbers
🏷️ regex, regular-expression, pattern, validation, credit-card, payment, financial, advanced
^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6(?:011|5[0-9]{2})[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\d{3})\d{11})$