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Common Regex Patterns

Collection of ready-to-use regular expressions for common validation tasks.
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Tool Introduction

Browse practical regular expressions for everyday web forms, APIs, logs, and data cleanup. Search by use case, copy the pattern, and test it against sample text directly in the browser.

The examples are written for modern JavaScript regular expressions and favor readable production checks over overly strict academic patterns. For validation that affects money, identity, or security, pair regex checks with server-side parsing and domain-specific rules.