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    Regex Tester & Debugger

    Test and debug regular expressions in real-time. Identify matches, capture groups, and validate patterns with our free online tool.

    Regular Expression
    Enter your regex pattern and flags.
    /
    /
    Test String
    Text to match against.
    Matches
    0 found
    Highlighted matches from your text.
    Enter a pattern to start matching.

    The Professional Regex Playground

    Regular expressions can be complex and error-prone. Our Regex Tester provides a real-time environment to validate your patterns against test strings. With visual highlighting of matches and capture groups, you can confidently build robust patterns for your code, whether you're working in JavaScript, Python, or Java.

    Key Features

    • Real-Time Highlighting: See exactly what your pattern matches as you type.
    • Capture Group Details: Inspect the contents of specific capture groups instantly.
    • Cheat Sheet Included: Quick reference for common regex tokens and syntax.
    • Interactive Debugging: Easily adjust flags and patterns to find the perfect match.

    Frequently Asked Questions