Regex Generator
Generate JavaScript-compatible regular expressions from common templates and examples.
Regex Generator
Generate regular expressions for common patterns like email addresses, URLs, IPv4 addresses, UUIDs, dates, slugs, and hex colors.
How to use it
- Choose a template or build a literal pattern from examples
- Toggle anchors when the whole string should match
- Copy the generated JavaScript-compatible regular expression
How to use Regex Generator
The regex generator helps create patterns from common templates and examples. It gives you a starting point that you can test and adjust.
Developers often use this page when they need regex generator, regex builder, regex maker, and regular expression generator.
Privacy and data handling
This generator creates values in the browser for testing, fixtures, and local development.
- Generated values are shown on the page and are not saved by the tool.
- Copy buttons use your browser clipboard permission when available.
- Review generated output before using it in production code or configuration.
Examples
Generate a date pattern
Input
Match dates like 2026-05-10Output
\d{4}-\d{2}-\d{2}Generated regex is a starting point. Test it with real examples and bad examples.
Steps
- 1Choose a common pattern or describe the kind of text you need to match.
- 2Generate the regex.
- 3Test it with real examples and bad examples.
Common use cases
- Create a simple email or URL pattern for validation.
- Build a pattern for IDs, dates, or log lines.
- Learn how regex pieces fit together.
Practical tips
- Generated regex should always be tested.
- Simple validation is often better than a very clever pattern.
- Avoid using regex to parse full HTML or complex nested formats.
FAQ
Can a regex generator make a perfect pattern?
No. It can create a useful starting pattern, but real data usually needs testing and adjustment.
Should I use regex for email validation?
A simple email regex is often enough for UI checks. Final validation should happen on the server or through a verification flow.