Regex Tester

Test regular expressions and see live matches in real time.

Input

Regex pattern: Flags (optional): Test text:

Output

What is the Regex Tester?

The Regex Tester allows developers to test regular expressions and instantly see live matches, captured groups and index positions. As you type, the tool updates in real time, making it ideal for debugging patterns, validating input formats, building search logic or learning regex syntax. All processing runs fully client‑side, ensuring privacy and immediate performance. A fast and reliable way to experiment with regex without external tools or command‑line utilities.