Regex Tester & Matcher
Test regular expressions with live match highlighting, flags, and group details.
Flags:
//gi
2 matches found
Live Match Highlighting
Contact support at hello@example.com or sales@acme.co for questions.
Replacement Preview
Match Breakdown (2)
| # | Index | Match | Capture Groups |
|---|---|---|---|
| 1 | 19 | hello@example.com | None |
| 2 | 40 | sales@acme.co | None |
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About Regex Tester & Matcher
Test regular expressions online with live match visual highlighting, regex flags support, and capture groups. This tool operates completely in your web browser. No text inputs are ever sent to remote servers or stored in any database, ensuring 100% data privacy for code, API payloads, or confidential documents.
Client-Side Privacy Guarantee
All text transformations run inside your browser tab. Zero server logging or tracking.
100% Private & Offline Capable
Executes locally via JavaScript. Your text never leaves your device.
Instant Real-Time Results
No network latency or server waits. See outputs instantly as you type.
Frequently Asked Questions
Which flags are supported?
Supports g, i, m, s, u, and y flags.