Runs locally
Common Regex Patterns
Starting points for email, URL, numbers and more.
One or more digits
A practical email shape
An http(s) URL
A URL slug
A UUID v4
A rough IPv4 shape
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Patterns are examples to copy into the regex tester. They are not a guarantee for every input.
About this tool
Start from a proven pattern instead of writing one from scratch. Search the library for what you need to match, copy the expression and try it on your own data.
How to use it
- 01
Search for a pattern, for example email.
- 02
Copy the regular expression.
- 03
Test it on your data in the Regex Tester.
FAQ
Frequently asked questions
Will these patterns match every valid input?
They are practical examples, not guarantees. Test them against your real data before relying on them.
Which regex flavor are they written for?
JavaScript, which is close to the syntax used in most languages.