Testing
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Regex Tester & Debugger (Free Online)
Test regular expressions with live match highlighting. Supports flags, capture groups, and detailed match information.
Free foreverNo signupBrowser-based
Category
Testing Tools
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Mode
Client-side
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Frequently asked questions
What regex flavor does this support?+−
This tester uses JavaScript (ECMAScript) regular expression syntax, which supports flags: g, i, m, s, u, y.
Why Regex Tester lives here
Test regular expressions with live match highlighting. Supports flags, capture groups, and detailed match information.
This workspace keeps the interaction lightweight and private. The tool runs in the browser, keeps the workflow immediate, and sits next to related actions so repeat visits are quicker.
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