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Regex Generator

Build regular expressions visually from common patterns with real-time testing and match highlighting

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About This Tool

Regex Generator lets you build regular expressions visually by selecting from 12 common patterns like email, URL, phone, and date. It combines selected patterns automatically, supports regex flags, provides real-time match testing with highlighting, and explains each token in your expression.

Key Features

Quick Preview

Use Cases

regex datetime generator

Frequently Asked Questions

What is the Regex Generator?

The Regex Generator is an online developer tool that builds regular expressions visually from common patterns with real-time testing and match highlighting. It runs entirely in your browser with no data sent to any server.

What patterns can I generate without writing regex?

The tool provides visual selectors for common patterns including email addresses, URLs, phone numbers, IP addresses, dates, numbers, alphanumeric strings, and postal codes. Select your desired pattern from the dropdown and the regex is generated automatically.

Can I test the generated regex in real time?

Yes. The tool includes a live test area where you can enter sample text and see matches highlighted in real time. This helps you verify that the generated regex correctly matches your intended patterns before using it in your code.

What regex flags are supported?

The tool supports common regex flags: g (global - find all matches), i (case-insensitive), m (multiline), and s (dotall). You can toggle these flags on and off to customize how the regex matches your test text.

Can I combine multiple patterns?

Yes. You can build complex regex by combining multiple pattern rules. The tool allows you to chain patterns with logical operators (AND/OR) and add quantifiers, making it possible to create sophisticated regex expressions without manual coding.