Regex Editor & Tester

Validates usernames between 2 and 16 characters that support Unicode. It matches any non-ASCII character (such as accented letters, Cyrillic, CJK, or emoji) as well as word characters, underscores, spaces, dots, plus signs, and hyphens. Typically used in web form validation to allow international usernames while enforcing a length limit. Note that in JavaScript, \w matches only ASCII word characters unless the 'u' flag is used.