Regular Expression Tester
Regex Quick Presets
//gi
Test String Input
Live Highlighted Output2 Matches
Contact support at hello@toolshub.app or dev.team@google.com for help.
Detailed Match List & Capture Groups
| # | Match Value | Index (Range) | Capture Groups |
|---|---|---|---|
| 1 | hello@toolshub.app | Pos: 19 (19-37) | None |
| 2 | dev.team@google.com | Pos: 41 (41-60) | None |
Free Online Regular Expression Tester
Test and debug regular expressions with live match highlighting as you type. Toggle common flags, use preset patterns for emails and URLs, and view capture groups instantly — all running natively in your browser with JavaScript's regex engine.
Who Uses a Regex Tester?
Developers validating form input, writers doing find-and-replace across large documents, and data analysts extracting patterns from text all rely on regex testers to build and verify their patterns before using them in production code.
Frequently Asked Questions
Find answers to common questions about this tool, data privacy, and usage.
Enter your regular expression pattern and test text, and matches are highlighted live as you type, so you can see instantly whether your pattern works.
