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Regex Roulette · #4 · 2026-04-08

Match simple email addresses

Difficulty 2/3

How to play

Write a regex that matches all green strings and rejects all red strings. Live feedback shows which strings pass. Shorter patterns score better.

Must match

Must not match

  • @b.com — not yet evaluated
  • user@ — not yet evaluated
  • no-at-sign — not yet evaluated
  • [email protected] — not yet evaluated

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Pattern body only — slashes and flags (e.g. /g, /i) aren't part of the input.

0/200 chars

Type a regex that matches all green strings and rejects all red strings · Back to hub