Regex Tester & Debugger
Regular Expression
0 characters
Test String
0 characters
Regex Analysis
2
Matches Found
Valid pattern
0
Capture Groups
No groups
0
Execution Time
ms
1
Complexity
Simple
Match Visualization
Matches
Capture Groups
Match Details
Regex Explanation
Replace Results
Regex Cheatsheet
Character Classes
.
Any character except newline
\d
Digit (0-9)
\w
Word character (a-z, A-Z, 0-9, _)
\s
Whitespace (space, tab, newline)
[abc]
Any of a, b, or c
Quantifiers
*
0 or more times
+
1 or more times
?
0 or 1 time (optional)
{n}
Exactly n times
{n,}
n or more times
Anchors & Boundaries
^
Start of string/line
$
End of string/line
\b
Word boundary
\B
Not a word boundary
\A
Start of string
Groups & Lookarounds
(abc)
Capture group
(?:abc)
Non-capturing group
(?=abc)
Positive lookahead
(?!abc)
Negative lookahead
(?<=abc)
Positive lookbehind
Real-time Testing
Test regular expressions in real-time with instant feedback and match highlighting
Visual Match Display
See exactly what your regex matches with color-coded highlighting and visualization
Detailed Analysis
Get comprehensive analysis including match count, capture groups, and execution time
Learning Resources
Access regex cheatsheet, explanations, and examples to learn and improve your skills