regex101: PCRE (Legacy) Match Workspace

Pro

\ban ASCII word boundary

Negative Lookbehind(?<!@)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Non-Capturing Group(?:www\.)?

?repeats the group contents below at most once:

wwwthe literal text www (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negated Character Class[^@\s]+

+matches at least one character outside the set below:

@the literal @ (64₁₀ / 100₈ / 40₁₆)

\sany whitespace character

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\w{2,3}any word character, repeated between 2 and 3 times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

25 tokens

Regular Expression

\b(?<!@)(?:www\.)?[^@\s]+\.\w{2,3}

New

Lorem www.example.in ipsum #web-developer dolor sit amet, consectetur adipiscing elit. Donec suraj@mishra.com consequat sem eros, et volutpat google.com lacus dignissim ac. Pellentesque ac nisl et erat porta feugiat. +91-141-2561894 Vestibulum #web_designing sodales semper stackoverflow.com

Substitution

Lorem www.example.in ipsum #web-developer dolor sit amet, consectetur adipiscing elit. Donec suraj@mishra.com consequat sem eros, et volutpat google.com lacus dignissim ac. Pellentesque ac nisl et erat porta feugiat. +91-141-2561894 Vestibulum #web_designing sodales semper stackoverflow.com