Strategic Context & How To Use:

Evaluates regular expressions against live sample text with color-coded capture groups, match indices, and detailed plain-English regex syntax breakdowns. For example, test complex email validation or phone number regex patterns in real-time with instant detection of catastrophic backtracking performance vulnerabilities.

Regex Tester & Pattern Explainer

Test and debug regular expressions with live visual match highlighting and capture group inspection.

Presets:

/ / g

g i m s

3 Matches Found

Execution: < 1ms

Test String

Hello! Contact support at support@core-ai.app or sales team at billing@enterprise.org. Invalid email: test@domain.

Visual Highlight Preview

Match & Capture Groups 3 Matches

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