🔍 Regex Tester

Test and debug regular expressions in real time.

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Regex Tester — Regular Expression Debugger

A regular expression (regex) is a sequence of characters that defines a search pattern. Regex is used in programming for text search, text replace, input validation, and string parsing. Our real-time regex tester shows all matches as you type — no need to run code. Supports all JavaScript regex flags: g (global), i (case-insensitive), m (multiline), and s (dotAll).

Common Regex Patterns

Email
^[\w.-]+@[\w.-]+\.\w{2,}$
URL
https?:\/\/[\w\-.]+\.[a-z]{2,}
Phone (US)
\(?\d{3}\)?[-.\s]?\d{3}[-.\s]?\d{4}
IP Address
\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b
Hex Color
#[0-9A-Fa-f]{6}\b
Date (YYYY-MM-DD)
\d{4}-\d{2}-\d{2}