Validation Regex Patterns

Captures just the domain portion from email addresses.

Matches email addresses while excluding common free email providers like Gmail and Yahoo.

More comprehensive email validation following RFC 5322 standards.

Basic email validation matching user@domain.tld format.

Matches email addresses with optional display name like 'John Doe <john@example.com>'.

Validates password length between 8 and 128 characters with any characters allowed.

Validates passwords with at least 6 characters, one letter and one digit.

Validates passwords that contain no whitespace characters.

Validates passwords with at least 8 characters, one uppercase, one lowercase, one digit, and one special character.

Matches Australian phone numbers in common formats.

Matches Brazilian phone numbers with DDD area codes.

Matches German phone numbers with optional country code.

Matches Indian mobile numbers with optional country code.

Matches international phone numbers in E.164 format.

Matches Japanese phone numbers in common formats.

Matches UK phone numbers with optional country code.

Matches US phone numbers in various common formats.

Matches valid GitHub usernames.

Matches social media hashtags.

Matches Twitter/X usernames starting with @.

Matches URLs starting with http:// or https://.

Matches UK postcodes in standard format.

Matches US ZIP codes in 5-digit or ZIP+4 format.