📧 Email Address
^[\\w.-]+@[\\w.-]+\\.\\w+$
Validates email format
🔗 URL / Website
https?://[\\w.-]+\\.[\\w.]+
Matches web URLs
📞 Phone (US)
\\d{3}[-.]?\\d{3}[-.]?\\d{4}
US phone format
📱 Phone (International)
\\+?\\d{1,4}[\\s.-]?\\(?\\d+\\)?[\\s.-]?\\d+
International format
🎨 Hex Color
#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})
Matches hex colors
🌐 IPv4 Address
\\b\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\b
IPv4 format
🌍 IPv6 Address
([0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}
IPv6 format
📅 Date (ISO)
\\d{4}-\\d{2}-\\d{2}
YYYY-MM-DD format
📆 Date (US)
\\d{1,2}/\\d{1,2}/\\d{4}
MM/DD/YYYY format
🕐 Time (24h)
([01]?[0-9]|2[0-3]):[0-5][0-9]
HH:MM format
🕑 Time (12h)
\\d{1,2}:\\d{2}\\s?(AM|PM|am|pm)
12-hour with AM/PM
👤 Username
^[a-zA-Z0-9_-]{3,16}$
3-16 alphanumeric
🔒 Strong Password
^(?=.*[a-z])(?=.*[A-Z])(?=.*\\d).{8,}$
8+ chars with cases
💳 Credit Card
\\d{4}[\\s-]?\\d{4}[\\s-]?\\d{4}[\\s-]?\\d{4}
16-digit card number
🆔 SSN
\\d{3}-\\d{2}-\\d{4}
Social Security Number
📮 ZIP Code
\\d{5}(-\\d{4})?
US ZIP or ZIP+4
🏷️ HTML Tag
<([a-z]+)([^<>]*)>
Opening HTML tags
🖧 MAC Address
([0-9A-Fa-f]{2}[:-]){5}[0-9A-Fa-f]{2}
Network MAC address
🌐 Domain Name
^[a-zA-Z0-9][a-zA-Z0-9-]{0,61}[a-zA-Z0-9]\\.[a-zA-Z]{2,}$
Valid domain names
🔗 URL Slug
^[a-z0-9]+(?:-[a-z0-9]+)*$
SEO-friendly URLs
📝 Markdown Link
\\[([^\\]]+)\\]\\(([^\\)]+)\\)
Markdown [text](url)
#️⃣ Hashtag
#[a-zA-Z0-9_]+
Social media hashtags
@ Mention
@[a-zA-Z0-9_]+
Social media @mentions
🔢 Number
-?\\d+(\\.\\d+)?
Integer or decimal