Regex Roulette · #49 · 2026-05-23
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
- a@b.co — not yet evaluated
- user@mail.com — not yet evaluated
- test.name@domain.org — not yet evaluated
Must not match
- @b.com — not yet evaluated
- user@ — not yet evaluated
- no-at-sign — not yet evaluated
- user@.com — 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