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.
Related free tools
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