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Regex Pattern Library

12 ready-made validation patterns — each explained token by token, with match examples and a live tester. Building your own instead? Use the regex tester.

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]+)*$