RegEx Builder

    Build and test regular expressions with real-time validation

    Pattern Builder

    Select a common pattern or write your own

    g (global), i (case-insensitive), m (multiline), etc.

    Test Area

    Test your regular expression against sample text

    RegEx Guide

    Basic Patterns

    • . - Any character except newline
    • \w - Word character [A-Za-z0-9_]
    • \d - Digit [0-9]
    • \s - Whitespace character
    • [abc] - Any character in the set
    • [^abc] - Any character not in the set

    Quantifiers

    • * - 0 or more
    • + - 1 or more
    • ? - 0 or 1
    • {n} - Exactly n times
    • {n,} - n or more times
    • {n,m} - Between n and m times