Regex Cheatsheet - Regular Expression Quick Reference
Quick reference for regular expression patterns. Character classes, quantifiers, anchors, and common patterns.
Capturing Group (abc)
GroupGroups expression into capturing unit, accessible via \1 or $1
Pattern
(abc)Syntax
Explanation
Capturing groups save matched content, accessible via backreferences \1, \2.
Examples
(\w+)\s+\1Matches repeated words
Matches: hello hello
(\d{4})-(\d{2})-(\d{2})Captures year-month-day
Matches: 2024-01-15
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