Regex for blank lines

Note

Replace with nothing to delete empty and whitespace-only lines.

Matches in the example

• "\n \n"
• "\n"

Token by token

1. ^ the start of the string (or line, with the m flag)
2. \s* a whitespace character, zero or more times, as many as possible
3. $ the end of the string (or line, with the m flag)
4. \n a line feed

Other patterns

• Email address
• URL
• IPv4 address
• UUID
• Hex color
• Date (YYYY-MM-DD)
• Time (24-hour)
• US phone number
• Phone number (E.164)
• US ZIP code
• Credit card number
• URL slug
• Username
• Strong password
• HTML tag
• Semantic version
• MAC address
• JSON Web Token
• Hashtag
• @mention
• Number
• Leading and trailing whitespace
• Repeated word
• Blank lines
• Markdown link
• Quoted string
• Domain name
• File extension
• Base64
• Trailing comma