JsonifyTools

    Regex Validator

    Test and validate regular expressions with live matching

    Regular Expression
    Flags:
    //g
    Test String0 characters
    Match Highlight0 matches
    Enter a regex pattern to see matches
    Match Details
    Match details will appear here
    Quick Reference▼

    Characters

    . Any character
    \d Digit (0-9)
    \w Word character
    \s Whitespace

    Quantifiers

    * 0 or more
    + 1 or more
    ? 0 or 1
    {n} Exactly n

    Anchors

    ^ Start of string
    $ End of string
    \b Word boundary

    Groups

    () Capture group
    (?:) Non-capture
    | Alternation

    What is a Regex Validator?

    A Regex Validator helps developers test, validate, and debug regular expressions efficiently. It highlights matches in real-time and provides detailed feedback about patterns, flags, and errors.

    Features of This Regex Tool

    • Live matching and syntax highlighting
    • Supports regex flags (g, i, m, u, s, y)
    • Quick reference for characters, quantifiers, anchors, and groups
    • Test strings of any length
    • Copy and clear functionality

    Regex Examples

    # Match email addresses
^[\w.-]+@[\w.-]+\.\w{2,}$

# Match US phone numbers
^\(\d{3}\) \d{3}-\d{4}$

    Why Developers Use Regex Validators

    • Validate patterns before using in code
    • Debug complex expressions quickly
    • Learn regex syntax and best practices
    • Reduce errors in production code
    • Supports multiple programming languages