🔍Regex Generator

Generate regular expressions from plain-English descriptions or examples.

Standard email address

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

About Regex Generator

Build regular expressions from common pattern templates — email addresses, URLs, phone numbers, dates, IP addresses, postcodes, credit cards, and more. Choose a pattern category, customise flags and anchors, and get the regex with an explanation of each component. Test it against sample input immediately.

How to Use Regex Generator

1
Choose a pattern category
Select from templates like email, URL, phone, date, IP address, or hexadecimal color.
2
Customise options
Set flags (global, case-insensitive, multiline) and configure anchors as needed.
3
Copy the regex
Copy the generated pattern and test it against your sample data in the built-in tester.

Common Use Cases

Generating validation regex for form input fields
Building search patterns for log file analysis
Creating URL routing patterns for web frameworks
Learning regex syntax from explained pattern templates

Frequently Asked Questions

Can it generate regex from my own examples?

The template library covers the most common patterns. For custom patterns, select the closest template and modify the output regex, using the inline explanation as a guide.

What regex flavours are supported?

The generated regex is compatible with JavaScript, Python (re module), PHP (PCRE), and most modern regex engines. Flavour-specific differences are noted where they exist.