Tool

Regex Playground

Test regular expressions against sample text with live match highlighting and capture group inspection.

Codenexium Team 2026-08-16 Developer Tools

Open tool External resource

Why a playground

Regular expressions are easy to write and hard to read. Live highlighting makes it obvious when a pattern is greedy, anchored incorrectly or missing a capture group.

Tips

Start with the smallest possible pattern and grow it.
Test against both valid and invalid input.
Prefer named capture groups for anything you will maintain.

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