Pattern
/#[A-Za-z][A-Za-z0-9_]{1,49}/Sample text
Love #Regex and #RegexBench #1invalid ##doubleTest this pattern in the editor
Hashtags
Social-style #tags with letters and digits.
Related patterns
Email addresses
Capture local and domain parts from common email shapes.
24-hour time
Match HH:MM or HH:MM:SS clock times.
Usernames
3–16 chars: letter start, then letters, digits, underscore.
URL slugs
kebab-case slugs for routes and CMS paths.
US ZIP codes
5-digit ZIP or ZIP+4.
Russian postal codes
Six-digit Russian postal index.