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Regex Tester

Test matches, capture groups and replacements in real time. Your expression and sample text are never uploaded.

Content is processed only in your browser
ExpressionUses JavaScript regex syntax. Capture groups appear in the results.
//g
Sample textMatches are highlighted in the result
Match results
Enter an expression and sample first
See highlighted matches and capture groups live, then preview replacements if you need them.
Supports $1, $2 and other capture-group references. Leave empty to highlight matches.
Regex Tester with Replace Preview & Capture Groups | ToolsClub