Regex Tester for JavaScript
Free online regex tester with JavaScript code examples
Working with regex tester in JavaScript? Our free online regex tester helps JavaScript developers format, validate, and process data instantly. Below you will find JavaScript code examples using RegExp (built-in) so you can achieve the same result programmatically in your own projects.
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Open Regex TesterJavaScript Code Example
const text = "Contact us at support@example.com or sales@example.com";
const pattern = /[\w.+-]+@[\w-]+\.[\w.]+/g;
const matches = text.match(pattern);
console.log(matches); // ['support@example.com', 'sales@example.com']Quick Setup
Library: RegExp (built-in)
// Built-in global — no installation neededJavaScript Tips & Best Practices
- Use the /g flag for global matching (all occurrences)
- Use named capture groups: /(?<name>pattern)/
- String.matchAll() returns an iterator with capture groups