Regex Tester
Test, debug, and understand your regular expressions in real-time with our powerful tool
Regular Expression
Results
5
Matches Found
0
Groups Captured
1ms
Processing Time
The quick brown fox jumps over the lazy dog. Regular expressions are powerful! Testing words like: apple, banana, cherry, date, and fig.
Match 1 at index 4:
Full match: quick
Match 2 at index 10:
Full match: brown
Match 3 at index 20:
Full match: jumps
Match 4 at index 87:
Full match: words
Match 5 at index 99:
Full match: apple
Regex Guide & Reference
Basic Patterns
.- Any single character\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[^abc]- Not a, b, or c\b- Word boundary\t- Tab character
Quantifiers
*- 0 or more+- 1 or more?- 0 or 1{3}- Exactly 3{3,}- 3 or more{3,5}- Between 3 and 5*?- Lazy quantifier (as few as possible)
Groups & Lookarounds
(abc)- Capture group(?:abc)- Non-capturing groupa(?=b)- Positive lookaheada(?!b)- Negative lookahead(?<=a)b- Positive lookbehind(? - Negative lookbehind\1- Backreference to first group
Anchors & Special
^ - Start of string$ - End of string\b - Word boundary\A - Start of string\z - End of string\n - New line\x20 - Hexadecimal character
Feature
Details
Price
Free
Rendering
Client-Side Rendering
Language
JavaScript
Paywall
No
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