How to Find & Use Regex Patterns

Browse and use common regex patterns. Free regex library with ready-to-use patterns for emails, URLs, phone numbers, and more.

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Step-by-Step Guide

1

Browse the pattern library

Explore the collection of common regex patterns organized by category: validation (email, phone, URL), extraction (dates, numbers, hashtags), and replacement (formatting, cleanup).

2

Find your use case

Search for your specific need: "email validation", "phone number", "URL extraction", etc. Each pattern includes a description, the regex itself, and example matches.

3

Copy and test the pattern

Click to copy the regex pattern. Paste it into the built-in regex tester or your own code. Test with sample input to ensure it matches your expectations.

4

Adapt as needed

Modify the pattern for your specific requirements. Add anchors (^ and $) for full-string matching, adjust quantifiers, or add flags (i for case-insensitive, g for global).

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Frequently Asked Questions

What are the most common regex patterns?
Common patterns include: email validation, URL matching, phone numbers, dates (YYYY-MM-DD), IP addresses, hexadecimal colors, credit card numbers, and social security numbers.
How do I read regex patterns?
Regex uses special characters: . matches any character, * means zero or more, + means one or more, ? makes it optional, [] defines character classes, () creates groups, and ^$ anchor to start/end.
Where can I learn more about regex?
Start with regex101.com for interactive learning and pattern testing. Regular-Expressions.info has comprehensive tutorials. The regex wiki on Stack Overflow has answers to common questions.
Related Reference

Regex Cheat Sheet

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