Regex Tester

JavaScript RegExp engine with lookahead, lookbehind, named groups, and Unicode properties.

Yes! Matching groups are highlighted with different colors.

Matches are highlighted in real-time so you can verify your pattern.

The Regex Tester is a free online tool that lets you test and debug regular expressions in real-time. It is part of NexTool's collection of free tools designed to help you work faster and more efficiently.

Using the Regex Tester is simple: visit the tool page, enter your data or input into the provided fields, and get instant results. No downloads, installations, or sign-ups are required. The tool runs directly in your web browser for maximum convenience.

Yes, the Regex Tester is 100% free to use with no limitations. There is no registration required, no daily usage caps, and no hidden fees. You can use it as many times as you need.

The Regex Tester uses industry-standard formulas and algorithms to deliver reliable results. While the tool is designed for accuracy, results should be used as estimates and guidance. For critical decisions, always consult a qualified professional.

The Regex Tester is designed to be language-agnostic where applicable. It processes input directly in your browser, so there are no compatibility issues. Check the tool description for specific format support.