Regex Pattern Library

Regex for Email Validation

^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$

Regex for URL Validation

^https?:\/\/[\w.-]+(?:\.[\w-]+)+[^\s]*$

Regex for Phone Number Validation

^\+?[1-9]\d{7,14}$

Regex for UUID Validation

^[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}$

Regex for IPv4 Address Validation

^(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}$

Regex for IPv6 Address Validation

^([0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}$

Regex for Dates in YYYY-MM-DD Format

^\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01])$

Regex for 24-Hour Time (HH:MM)

^([01]\d|2[0-3]):[0-5]\d$

Regex for Password Validation

^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[^A-Za-z0-9]).{8,}$

Regex for Username Validation

^[a-zA-Z0-9_]{3,16}$

Regex for Hex Color Codes

^#(?:[0-9a-fA-F]{3}|[0-9a-fA-F]{6})$

Regex for URL Slug Validation

^[a-z0-9]+(?:-[a-z0-9]+)*$

Regex for MAC Addresses

^(?:[0-9A-Fa-f]{2}[:-]){5}[0-9A-Fa-f]{2}$

Regex for US ZIP Codes

^\d{5}(?:-\d{4})?$

Regex for UK Postcodes

^[A-Z]{1,2}\d[A-Z\d]? ?\d[A-Z]{2}$

Regex for Credit Card Numbers

^(?:\d[ -]?){12,18}\d$

Regex for Semantic Versions (SemVer)

^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-((?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+([0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$

Regex for Domain Names

^(?=.{1,253}$)(?:(?!-)[A-Za-z0-9-]{1,63}(?<!-)\.)+[A-Za-z]{2,63}$

Regex for HTML Tags

<\/?[a-zA-Z][a-zA-Z0-9-]*\b[^>]*>

Regex for ISO 8601 Date-Times

^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(?:\.\d+)?(?:Z|[+-]\d{2}:\d{2})$

Regex for Numbers Only (Digits)

^\d+$

Regex for Decimal Numbers

^-?\d+(?:\.\d+)?$

Regex for Alphanumeric Strings

^[a-zA-Z0-9]+$

Regex to Trim Leading and Trailing Whitespace

^\s+|\s+$

Regex for Base64 Strings

^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$

Regex for JSON Web Tokens (JWT)

^[A-Za-z0-9_-]+\.[A-Za-z0-9_-]+\.[A-Za-z0-9_-]*$