Regex Data Generator — Generate Sample Strings From a Pattern

How to use

1. 1 Type or paste a regex pattern. Don't wrap it in slashes — just the body.
2. 2 Set the count slider (1–100).
3. 3 Hit Sample for a phone-number example to see how the syntax works.
4. 4 Copy the list or download as plain text.

Why use this tool

• Powered by <code class="font-mono text-xs">randexp</code> — generates strings that match a given regex.
• Library loaded lazily — page stays light.
• Great for seeding test data, fixtures, or fuzzing inputs.
• Pure client-side — your patterns and outputs stay local.

Frequently asked questions

What is Regex Data Generator?

A Regex Data Generator is a tool that produces strings matching a supplied regular expression pattern. It can generate from 1 to 100 results at a time, making it useful for creating test data, fixtures, and inputs for fuzzing. Running entirely in the browser, it lets developers build sample datasets from a regex without sending the pattern or output to a server.

Learn the basics

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