500+ Common Regex Patterns Library

Browse, search, and copy from our curated collection of battle-tested regular expressions for every use case.

← Back to RegEx Tester
0 patterns

What is the 500+ Common Regex Patterns Library?

Browse 500+ ready-to-use regular expression patterns for emails, URLs, phone numbers, passwords, dates, credit cards, IPs, and more. Copy patterns instantly.

How to use the 500+ Common Regex Patterns Library?

  1. Browse or search the pattern library using the filter box at the top.
  2. Click 'Copy' to copy any pattern to your clipboard instantly.
  3. Click 'Test' to load the pattern into our live RegEx Tester tool.
  4. Each pattern includes a description and example matches.

Frequently Asked Questions

Are these regex patterns compatible with JavaScript?

Yes. All patterns are designed for JavaScript RegExp compatibility. Most also work with Python, PHP, Java, and other engines that support PCRE-style syntax.

How should I validate email addresses with regex?

For basic validation, use our email pattern that checks for a standard format. For production systems, combine regex validation with an email verification API, since regex alone cannot confirm deliverability.

Can I use these patterns for input validation?

Absolutely. These patterns are designed for form validation, data extraction, and search operations. Remember to anchor patterns with ^ and $ for full-string validation.

What does the 'g' flag do?

The 'g' (global) flag finds all matches in the text instead of stopping after the first. Use it when you need to extract or highlight multiple occurrences.