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Regex Tester
Test regular expressions against text and see matches highlighted.
manage_search Regex Tester
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Debug and test JavaScript regular expressions in real time. Enter a pattern, choose flags (g, i, m, s, u, y), paste test text, and see every match with its index and capture groups instantly. No page reloads — results update as you type.
Frequently Asked Questions
Which regex flavor does this use? expand_more
JavaScript's built-in RegExp engine. Patterns are evaluated with the flags you specify (default: gi).