- No data uploaded
- Instant results
Regex Tester
Type a pattern and flags to highlight matches in your test text instantly.
Regex Tester
Matches/\b[\w.+-]+@[\w-]+\.[\w.]+\b/gi
Contact sales@example.com or support@test.co.uk — not user@invalid
| # | Match | Index | Groups |
|---|---|---|---|
| 1 | sales@example.com | 8 | — |
| 2 | support@test.co.uk | 29 | — |
JavaScript (ECMAScript) regular expressions. Without the g flag only the first match is used by String.match — this tester always lists all matches.
Frequently asked questions
Is my data uploaded?
No. The calculation runs entirely in your browser — nothing you type is sent to a server.
Is it free?
Yes — free, unlimited and no sign-up.