Regex Editor & Tester

This regular expression is designed to match and extract basic email addresses from multiline text. It captures three components: the local part (up to 100 word characters), the domain name, and the top-level domain (TLD). Note that it only matches alphanumeric and underscore characters, meaning it will fail on valid emails containing hyphens, dots in the local part, or multiple subdomains. It is best suited for simple data validation or extraction tasks where strict RFC compliance is not required.