Extraction

Match an @-mention

Flags: g

Extract @username mentions from text (Twitter, GitHub, etc).

Pattern

Regular expression

@[A-Za-z0-9_]{1,39}

How it works

Matches `@` followed by 1–39 word characters (the maximum GitHub / Twitter handle length). Underscores allowed, no hyphens.

Matches

▸@octocat
▸@user_name
▸@a

Non-matches

▸email@example.com (`@` inside word)
▸@ (empty)

Common gotchas

To avoid matching `@` inside email addresses, prepend a word boundary and require the `@` to be at the start of a token: `(?:^|[^\w])@[A-Za-z0-9_]{1,39}` and trim the leading non-word char.

Language snippets

JavaScript

const re = /@[A-Za-z0-9_]{1,39}/g;

Python

re.findall(r"@[A-Za-z0-9_]{1,39}", text)

re := regexp.MustCompile(`@[A-Za-z0-9_]{1,39}`)

Java

Pattern.compile("@[A-Za-z0-9_]{1,39}")

Related patterns

Match a hashtag

#\w+

Extract a URL query parameter

[?&]KEY=([^&#]*)

Match a quoted string

"(?:[^"\\]|\\.)*"

Match an HTML tag

<\/?[A-Za-z][A-Za-z0-9]*\b[^>]*>

Try any pattern live in the Regex Tester →