Digital3D Regex Tester Pro is online!

A professional, free, and online tool to test your regular expressions in real time.

What can you do with Regex Tester Pro?

• Test your regex instantly — Enter your text and your pattern, the results are displayed in real time with clear highlighting of matches.
• 3 regex engines to choose from — Switch between .NET, PCRE2, and PCRE2-JavaScript to validate your expressions according to your target environment.
• All options at your fingertips — IgnoreCase, Multiline, Singleline, IgnoreWhitespace, ExplicitCapture, ECMAScript, and many more. Options not supported by the selected engine are automatically grayed out.
• Text replacement — Test your regex substitutions directly in the interface.
• Visualization of capture groups — Inspect each match in detail: value, position, length, and named groups.
• Anti-ReDoS protection — A 5-second timeout protects against catastrophic expressions. Test safely.
• Dark / light theme — Work comfortably, day or night.

Who is this tool for?

Regex Tester Pro is aimed at anyone working with regular expressions:

• .NET / C# developers — Test your regex with the native .NET engine, exactly as in your code.
• PHP, Python, Ruby, C++ developers — The PCRE2 engine is the standard used by most modern languages.
• JavaScript / TypeScript developers — The PCRE2-JavaScript mode replicates the behavior of regex in the browser.
• DevOps & system administrators — Validate your patterns for grep, sed, awk, or your configuration files.
• Data analysts & scientists — Build and verify your data extraction regex.
• Students & trainers — Learn and teach regular expressions with immediate visual feedback.

Why choose Regex Tester Pro?

Unlike other online tools, Regex Tester Pro allows you to choose your regex engine. No more surprises in production because your regex worked on a JavaScript tester but not in your .NET application. Test with the right engine, get the right results.

The tool is 100% free, no registration, and your text is never stored on our servers. Your privacy is our priority.

Try it now:
https://regex.digital3d.com