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About Regex Tester

Regex Tester is a free online tool that allows you to test and validate regular expressions (Regex) directly in your browser. Instantly highlight matching text, count matches, and experiment with different Regex patterns using common flags such as Global, Ignore Case, and Multiline. No data is uploaded or stored.

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Features

• Test regular expressions instantly.
• Highlight all matching text.
• Support Global (g), Ignore Case (i), and Multiline (m) flags.
• Real-time matching while typing.
• Display total matches.
• Character, line, and pattern statistics.
• Built-in sample data.
• Copy results with one click.
• Works entirely in your browser.
• No registration required.
• 100% free to use.

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How to Use

1. Enter your regular expression.
2. Choose the Regex flags you want.
3. Paste or type your text.
4. Click Test Regex.
5. Review the highlighted matches.

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Frequently Asked Questions

What is Regex?

Regex (Regular Expression) is a pattern used to search, validate, and manipulate text efficiently.

Is this Regex Tester free?

Yes. It is completely free and works directly in your browser.

Is my text uploaded?

No. Everything is processed locally in your browser, so your data remains private.

Which Regex flags are supported?

This tool supports Global (g), Ignore Case (i), and Multiline (m).

Who can use this tool?

It is useful for developers, students, QA engineers, system administrators, and anyone working with text processing.

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