The Regex Library

Copy battle-tested validation patterns. No regex knowledge required.

What this does

This tool gives you ready-to-use regular expression patterns for common validation tasks like emails, dates, passwords, and URLs. Select a pattern, copy the code, and paste it into your project.

How it works

Select what you want to validate (email, date, password, etc.).

Copy the regex pattern that appears.

Test it with the live input field to see if it works.

Paste the pattern into your code (JavaScript, Python, etc.).

Why it matters

Writing regex from scratch is error-prone and time-consuming. These patterns are battle-tested and handle edge cases you might miss. Don't reinvent the wheel.

The Logic

Regex (Regular Expressions) are sequences of characters that define a search pattern. They are used for string searching and manipulation.