Regex Tester

The Regex Tester is a powerful online tool that helps you test, debug, and visualize regular expressions across different programming languages. With support for popular flavors such as PCRE, JavaScript, Python, Golang, Java, .NET, and Rust, you can experiment and understand how regex patterns work in real-time.

The tool offers advanced features like match highlighting, group breakdowns, and in-depth regex explanation for each part of your pattern. You can toggle common flags like g, m, i, and more — with descriptions — to customize your test cases precisely.

Whether you're a developer, tester, SEO specialist, or data analyst, this tool is ideal for handling text parsing tasks efficiently. Test your regular expressions instantly in the browser — no installation or account required.

• Supports multiple regex engines and flavors
• Visual explanation and group positions
• Real-time match preview and flag customization
• Free to use with no sign-up needed