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A Regex Tester is a tool that lets you test, validate, and debug regular expressions (RegEx) in real-time. You can paste your regex pattern and a sample string, and this tool will highlight all matching results instantly. It's ideal for developers, QA engineers, and data validators.
g, i, m, etc.Regular expressions (RegEx) help you search, match, or extract specific patterns in text. They are used for:
A regular expression is a sequence of characters that defines a search pattern. It is commonly used for pattern matching in strings.
Yes, it supports all standard JavaScript RegExp flags including g (global), i (case-insensitive), m (multiline), and more.
Yes, it's completely free to use with no signup or limits.
No. All operations happen in your browser. We don’t store or track anything.