How do I test a regular expression?

Enter your pattern and flags, then provide test input. The output shows each match and its index.

What flags are supported?

Use standard JavaScript regex flags such as g, i, m, s, u, and y.

Can I test regex safely without uploading data?

Yes. Everything runs client-side and no test text is sent to a backend.

Regex Generator | DevTools.Solutions

Regex Pattern Generator

Describe What You Need

Frequently Asked Questions

What kind of prompts work best?

Use specific descriptions such as "match IPv4 addresses" or "extract invoice IDs".

Is the pattern production-ready?

Treat generated regex as a starting point and validate against your real input cases.

Is generation private?

Yes. Input stays in your browser.

Example input/output

Input: Match all email addresses

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

How it works

This tool uses a lookup of common pattern descriptions to suggest matching regular expressions. You describe the match goal and the tool returns a usable regex pattern. Processing runs in your browser.

Common use cases

Generate regex patterns for common validation use cases (email, phone, URL)
Create regex patterns from natural language descriptions
Produce ready-to-use patterns for form validation or parsing

Generate Regex Pattern