What is the Regex Tester?

It is a free online tool that lets you test regular expression patterns and view match results in real time, with detailed capture group display.

Is it free? Is my data safe?

Completely free. All processing happens in your browser, and input data is never sent externally.

Can beginners use it?

Yes. Match results are instantly highlighted as you type, so you can visually learn and test how your regex patterns work.

Regex Tester

A development support tool for visually testing and verifying regular expression patterns in real time. It highlights matches instantly, displays detailed capture group information, and supports flag toggling (g/i/m) for fine-tuned pattern control. Used by developers debugging regex patterns, students learning regular expressions, and anyone building text parsing logic.

Regex Pattern

//g

Common Patterns

Test String

Match Results

Enter a pattern to see match results

Practical Guide

Tools for everyday text work such as counting, replacing, comparing, reading aloud, and converting tables. Useful for draft review, log cleanup, documentation prep, and small editorial tasks.

When this tool is useful

Regex Tester helps with common Text Tools tasks that require quick checking, conversion, or creation. It supports workflows such as Real-time display of regex match results, Detailed capture group inspection without forcing users to switch pages or apps.

Processing and privacy

Your input is processed in the browser and is not designed to be sent to a server just to use the tool. This makes it suitable for temporary checks, draft work, and pre-publication cleanup.

Workflow tip

After checking the result, use the related tools and same-category links near the bottom of the page to continue the surrounding task. Frequently used tools also appear in the Recently Used section.