Regex Tester
Test regular expressions in real time
/ /
Test String
Replace
Replace Result
Match Results
| # | Match | Index | Length | Groups |
|---|
Quick Reference
.Any character\dDigit [0-9]\DNon-digit\wWord char [A-Za-z0-9_]\WNon-word char\sWhitespace\SNon-whitespace^Start of string/line$End of string/line\bWord boundary*0 or more+1 or more?0 or 1{n}Exactly n times{n,m}n to m times[abc]Character class[^abc]Negated class()Capture group(?:)Non-capture group(?=)Positive lookahead(?!)Negative lookahead(?<=)Positive lookbehind(?<!)Negative lookbehind|Alternation (OR)How to Use
1
Enter regex
Enter the regular expression to test.
2
Enter test string
Enter the text to match against.
3
View results
Matches are highlighted and group info is displayed.
FAQ
What flags are supported?
g (global), i (case insensitive), m (multiline), s (dotAll), and u (unicode) flags.
Are capture groups shown?
Yes, capture groups and index information are shown for each match.
Are files uploaded to a server?
No. All processing happens in your browser.
