Regex Editor & Tester
Test and debug regular expressions with live feedback, match highlighting, and capture group visualization.
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Preview & Matches
- Status
- Valid
- Matches
- 0
- Capture Groups
- 0
- Test string length
- 0
- Flags
- -
How it works
- 1
Enter pattern
Type or paste a regex pattern without slashes.
- 2
Choose flags
Enable global, case-insensitive, or other modifiers.
- 3
Test & debug
See matches highlighted and capture groups extracted.
Frequently asked questions
Is my regex and test string private?
Yes. All regex testing happens entirely in your browser—nothing is uploaded or stored.
What do the flags do?
g = global (all matches), i = case-insensitive, m = multiline, s = dotall, y = sticky, u = unicode.
Can I see capture groups?
Yes. When your pattern includes parentheses for capture groups, they'll be highlighted and displayed in the match details.