Test, debug, and replace regular expressions in real-time with match highlighting and capture group details.
| # | Index | Length | Full Match | Captured Groups |
|---|---|---|---|---|
| #1 | 30 | 20 | support@techtube.dev | Group $1:support Group $2:techtube Group $3:dev |
| #2 | 54 | 20 | john.doe@company.org | Group $1:john.doe Group $2:company Group $3:org |
| #3 | 95 | 20 | billing-dept@corp.io | Group $1:billing-dept Group $2:corp Group $3:io |
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An interactive client-side Regular Expression (RegEx) tester and debugger. It provides real-time pattern matching against test strings, detailed capture group breakdowns, substitution preview, flag toggles (g, i, m, s, u, y), syntax error diagnostics, and ready-to-use regex presets.
g = Global (find all matches), i = Case-Insensitive (ignore uppercase/lowercase), m = Multiline (^ and $ match line boundaries), s = DotAll (. matches newlines), u = Unicode support, y = Sticky matching.
You can reference captured groups in your replacement string using $1 for the first set of parentheses, $2 for the second, and $& for the entire match.
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