Regex Generator & Tester

Generate regex patterns and test them against your data instantly

Regex Generator

Generated regex will appear here...

Quick Examples:

  • Email: user@example.com
  • Phone: (555) 123-4567
  • URL: https://example.com
  • Date: 2024-12-31

Regex Tester

How to Use the Regex Generator & Tester

1

Choose a Pattern Type

Select from predefined patterns like email, phone, URL, or choose "Custom Description" to describe what you want to match.

Pattern Type: Email Address
2

Generate the Regex Pattern

Click "Generate Regex" to create the pattern. For custom descriptions, provide details like "3 digit numbers followed by a dash and 2 letters".

  • Use predefined patterns for common formats
  • Describe custom patterns in plain English
  • Build position-specific patterns with the visual builder
3

Test Your Regex

Paste your regex pattern in the tester section and provide test input. Choose from single string, list, or array format.

Test Input:
user@example.com
invalid-email
test@domain.org
4

Copy and Use

Copy the generated regex pattern and use it in your code. The tool shows match results with clear visual indicators.

Use Case Examples

Form Validation

Validate user input in web forms with regex patterns for emails, phone numbers, and custom formats.

Email Validation: 
^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$

Data Processing

Extract specific patterns from text data, log files, or user-generated content using regex matching.

Extract URLs: 
https?://[^\s/$.?#].[^\s]*

Code Analysis

Find and validate code patterns, function names, or specific syntax elements in source code files.

Function Names: 
function\s+[a-zA-Z_][a-zA-Z0-9_]*

Frequently Asked Questions

What is regex?

Regex (regular expressions) are patterns used to match character combinations in strings. They're powerful for searching, validating, and manipulating text.

How does the generator work?

Choose a pattern type or describe what you want to match. Our tool generates the appropriate regex pattern, which you can then test against your data.

Is my data secure?

Yes! All regex processing happens locally in your browser. Your patterns and test data never leave your device, ensuring complete privacy.

What input formats are supported?

You can test single strings, lists (one per line), or JSON arrays. The tool provides clear match results for each input format.

Related Tools

After creating your regex pattern, use our Regex Explain Tool to visualize and understand how your regex works.