Developer tool

Regex Tester

Test a JavaScript regular expression against sample text and inspect bounded matches.

Runs in your browser. No signup or cloud computer.

48 / 100,000

Result

Your result will appear here. The input stays in this browser tab.

How to use it

Put a pattern on the first line and test text below it to see matching substrings.

Try this example

Matrix\s+OS
Matrix OS connects tools and agents.

What to check

Patterns run in a disposable worker with a short timeout; some advanced or costly patterns may be rejected.

Review the result before using it in a published page, application, or agent configuration.

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