Regex Generator

Select a common pattern or build your own simple regex.

Detects email, URL, dates, or builds a custom pattern for you.
Custom Builder (Simple)
Test Your Regex

How to Generate Regular Expressions?

Regular Expressions (Regex) are powerful sequences of characters that specify a search pattern. They are widely used for validation (like checking emails) and text manipulation. Our tool simplifies this process:

  1. Select a Common Pattern: For standard tasks like "Email Validation" or "Date Matching", simply click the preset buttons to load a battle-tested regex.
  2. Build Custom Regex: Use our simple builder to define what your string should start with, end with, or contain.
  3. Test Instantly: Type any text into the "Test Your Regex" box. Matches will be highlighted instantly, showing you exactly what your pattern catches.

Common Regex Patterns Explained

TargetRegex PatternExplanation
Digits Only^\d+$Matches a string that consists entirely of numbers.
Email^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$Validates the standard format of an email address.
Date (YYYY-MM-DD)^\d{4}-\d{2}-\d{2}$Matches dates in ISO format.
Strong Password^(?=.*[A-Za-z])(?=.*\d)[A-Za-z\d]{8,}$Requires at least 8 characters, one letter, and one number.

Frequently Asked Questions

The Global g flag tells the regex engine to find all matches in the text, not just the first one. This is essential for replacing multiple instances of a word.

By default, yes. /a/ will not match "A". However, you can use the Case Insensitive i flag to match letters regardless of case.