Regex Tester
NewFree online regex tester. Write a regular expression and test it against your text in real time. See all matches highlighted, capture groups, and match details. Supports flags: global, case-insensitive, multiline.
Pattern
//
Test String
Guide
How to Use
- 1
Enter your regex pattern in the pattern field
- 2
Paste your test string in the text area
- 3
Toggle flags (g, i, m) as needed
- 4
Matches are highlighted automatically
FAQ
Frequently Asked Questions
What regex flavor is used?
JavaScript's built-in RegExp, which is ECMAScript-compatible and works in all modern browsers.
Can I test capture groups?
Yes. Named and numbered capture groups are shown for each match in the match details.