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    Regex Tester & Validator

    Test regular expressions with real-time highlighting and validation. Free online regex tester with common patterns, flags, and match details.

    Runs locally in your browser — your input is not uploaded.

    Try an example:

    Quick Patterns

    g all · i case · m multiline · u unicode · y sticky

    Enter a pattern and test text, then run Test Regex.

    Need examples? Regex Flags in JavaScript: g, i, m, s, u, y Explained
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    Learn more about this tool