Is this regex tester free?
Yes. Regex Tester is free to use and runs in your browser.
Generators
Regex Tester
Test regular expressions against sample text, inspect matches, and try flags safely in the browser.
Private by design
Input is processed locally in your browser.
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FAQ
Regex Tester questions
Is my data uploaded to a server?
No. The tool logic runs locally in your browser, so pasted text and files are not sent to Syntaxshel.
What is this page best for?
Use it when you need a fast regex tester online without installing software or opening a terminal.