Regex for markdown link

Note

Group 1 is the text, group 2 the URL, group 3 the optional title.

Matches in the example

• "[the docs](https://example.com/docs \"Docs\")"
• "[home](/)"

Token by token

1. \[ the character “[”
2. ( a capturing group
3. [^\]]+ any character except the character “]”, one or more times, as many as possible
4. ) end of group
5. \] the character “]”
6. \( the character “(”
7. ( a capturing group
8. [^)\s]+ any character except “)” or a whitespace character, one or more times, as many as possible
9. ) end of group
10. (?: a group, not capturing
11. \s+ a whitespace character, one or more times, as many as possible
12. " the character “"”
13. ( a capturing group
14. [^"]* any character except “"”, zero or more times, as many as possible
15. ) end of group
16. " the character “"”
17. )? end of group, whole group optionally
18. \) the character “)”

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