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Pattern Master Engine

The professional standard for regular expression testing. Validate, decode, and optimize your patterns with real-time semantic highlighting.

Regex Definition
Define your matching logic and operational flags
/
/
Source Subject
Input the text string to be analyzed by the engine
Processing Results
Latency: 0.02ms
0 Collisions Found

Pending input data for regex orchestration...

Standard Pattern Protocols
Deploy pre-validated logic strings for common validation use cases
Email
^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$
Phone (US)
^\(?([0-9]{3})\)?[-. ]?([0-9]{3})[-. ]?([0-9]{4})$
URL
^https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)$
IP Address
^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$
Credit Card
^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|3[47][0-9]{13}|3[0-9]{13}|6(?:011|5[0-9]{2})[0-9]{12})$
Password (Strong)
^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$
Date (YYYY-MM-DD)
^\d{4}-\d{2}-\d{2}$
Hex Color
^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$

Pattern Master: The Architecture of Regular Expressions

"Regex is the hidden language of data processing. Mastering it allows you to sculpt raw strings into meaningful intelligence."

Deterministic Logic

Our engine uses the internal V8 RegExp implementation, ensuring 1:1 parity with modern Javascript development environments.

Boundary Analysis

Identify word boundaries, line start/ends, and non-printable characters with absolute precision across multiple modes.

Group Orchestration

Advanced group matching allows you to extract specific sub-patterns for complex data parsing workflows.

1. The Hierarchy of Character Classes

The fundamental building blocks of regex are character classes. Whether you are targeting purely numerical data with \d or wide alphanumeric word characters with \w, understanding the specific scope of each class is the key to preventing "greedy" matching errors.

Developer Pro-Tip: Global Flag (g)

Without the global flag, the engine will stop processing after the very first collision found in the source string. Always enable (g) if you need to identify every occurrence within a large dataset.

Protocol Reference

Character Classes

. (any), \d (digit), \w (word), \s (whitespace), [abc] (set)

Quantifiers

* (0+), + (1+), ? (0-1), {n} (fixed), {n,m} (range)

Anchors

^ (start), $ (end), \b (boundary), \B (non-boundary)

Operators

| (alternation), () (grouping), \ (escape), [^] (not)
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