Developer tool

Regex Tester

Test regular expressions and inspect matched text.

How to use Regex Tester

A regex tester checks whether a regular expression matches text and shows the matched parts. It helps build and debug patterns before using them in code.

Basic idea

Pattern + sample text + flags = match result

What are regex flags?

Flags change how a pattern behaves, such as case-insensitive matching, global matching, or multiline matching.

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